/**


* @author RainChen @ Mon Mar 12 22:56:02 CST 2007

* @uses xajax file upload extend

* @access public

* @version 0.1 

*/



function xajax_extend()

{

    if(typeof(xajax) == 'undefined')

    {

        return false;

    }

    

    xajax.isIE = (document.all && navigator.appVersion.toLowerCase().indexOf('msie')!=-1) || false;



    xajax.newSessionID = function()

    {

        var sessionID;

        sessionID = new String(new Date().getTime());

        var random = new String(Math.random( )).substr(2);

        sessionID = sessionID + random;

        return sessionID;

    };

    

    // overlay this if you need to

    xajax.setStatusMessages = function(msg)

    {

        window.status = msg;

    };

    

    // overlay this if you need to

    xajax.setCursor = function(cursor)

    {

          if (document.body)

            document.body.style.cursor = cursor;

    };

    

    var loadingTimeout;

    // overlay this if you need to

       xajax.beforeUpload = function()

       {

        // init status

        if(xajaxWaitCursor) xajax.setCursor('wait');

           if(xajaxStatusMessages) xajax.setStatusMessages('Sending Request...');

        clearTimeout(loadingTimeout);

        loadingTimeout = setTimeout("xajax.loadingFunction();",400);

        if (xajaxDebug) xajax.DebugMessage("Starting xajax...");

       };



    xajax.upload = function(rpcFunc,formID,url)

    {

        var form = xajax.$(formID);

        if(!form)

        {

            return false;

        }

        if(form.encoding.toLowerCase() != 'multipart/form-data')

        {

            form.encoding = 'multipart/form-data';

        }

        if(form.method.toLowerCase() != 'post')

        {

            form.method = 'post';

        }

        var newSessionID = xajax.newSessionID();

        

        xajax.beforeUpload();



        if(!url)

        {

            url = xajaxRequestUri;

        }

        var separator = '?';

        if(url.indexOf('?') != -1)separator = '&';

        url += separator + 'xajax='+encodeURIComponent(rpcFunc);

        url += "&xajaxr=" + new Date().getTime();

        // get the upload file local path

        var formItem;

        var nodeName;

        for(var i=0; i<form.getElementsByTagName('input').length; i++)

        {

            formItem = form.elements[i];

            nodeName = new String(formItem.nodeName).toLowerCase();

            if(formItem.name == '' || nodeName == 'button')

            {

                continue;

            }

            if(formItem.type == 'file')

            {

                url += '&'+formItem.name+'='+encodeURIComponent(formItem.value);

            }

        }

        form.action = url;

        

        var iframeName = form.id + newSessionID;

        var iframe;

        if((iframe = xajax.$(iframeName)))

        {

            document.body.removeChild(iframe);

        }

        iframe = xajax.createIframe(iframeName,iframeName);

        form.target = iframeName;

        var xmlDoc;

        var responseXML;

        if(typeof iframe.onreadystatechange == 'object') // for IE
	
	        {
		
		            iframe.onreadystatechange = function()
			    
			                {
					
					                if(iframe.readyState == 'complete' && !iframe.loaded)
							
							                {
									
									                    // IE load twice (bug or feature?)
											    
											                        iframe.loaded = true;
														
														                    xmlDoc = document.frames(iframe.id);
																    
																                        if(xmlDoc.window.document.location != iframe.src)
																			
																			                    {
																					    
																					                            responseXML = xmlDoc.window.document.XMLDocument;
																								    
																								                            xajax.uploadResponse(responseXML,iframe, xmlDoc);
																											    
																											                        }
																														
																														                }
																																
																																            }
																																	    
																																	            }
																																		    
																																		            else // for FF
																																			    
																																			            {
																																				    
																																				                iframe.onload = function()
																																						
																																						            {
																																							    
																																							                    xmlDoc = iframe.contentWindow;
																																									    
																																									                    if(xmlDoc.window.document.location != iframe.src)
																																											    
																																											                    {
																																													    
																																													                        responseXML = xmlDoc.document;
																																																
																																																                    xajax.uploadResponse(responseXML,iframe, xmlDoc);
																																																		    
																																																		                    }
																																																				    
																																																				                }
																																																						
																																																						        }
																																																							
																																																							    };
																																																							    
																																																							        
																																																							    
																																																							        xajax.uploadResponse = function(responseXML,iframeObj, xmlDoc)
																																																								
																																																								    {
																																																								    
																																																								            // response the xml
																																																									    
																																																									            var error=false;
																																																										    
																																																										            if(responseXML)
																																																											    
																																																											            {
																																																												    
																																																												                try
																																																														
																																																														            {
																																																															    
																																																															                    xajax.processResponse(responseXML);
																																																																	    
																																																																	                }
																																																																			
																																																																			            catch(e)
																																																																				    
																																																																				                {
																																																																						
																																																																						                error = true;
																																																																								
																																																																								                //xajax.DebugMessage(e.description);
																																																																										
																																																																										            }
																																																																											    
																																																																											            }
																																																																												    
																																																																												            else
																																																																													    
																																																																													            {
																																																																														    
																																																																														                error = true;
																																																																																
																																																																																        }
																																																																																	
																																																																																	        
																																																																																	
																																																																																	        if(error)
																																																																																		
																																																																																		        {
																																																																																			
																																																																																			            var responseText = new String(xmlDoc.document.body.innerHTML);
																																																																																				    
																																																																																				                xajax.uploadFalse(responseText);
																																																																																						
																																																																																						        }
																																																																																							
																																																																																							        else
																																																																																								
																																																																																								        {
																																																																																									
																																																																																									            xajax.uploadSuccess();
																																																																																										    
																																																																																										            }
																																																																																											    
																																																																																											    
																																																																																											    
																																																																																											            // remove the iframe after response
																																																																																												    
																																																																																												            setTimeout(function(){document.body.removeChild(iframeObj)}, 500);
																																																																																													    
																																																																																													        };
																																																																																														
																																																																																														    
																																																																																														
																																																																																														    // overlay this if you need to
																																																																																														    
																																																																																														        xajax.uploadFalse = function(responseText)
																																																																																															
																																																																																															    {
																																																																																															    
																																																																																															            var errorString = "Error: the XML response that was returned from the server is invalid.";
																																																																																																    
																																																																																																            errorString += "\nReceived:\n" + responseText;
																																																																																																	    
																																																																																																	            var trimmedResponseText = responseText.replace( /^\s+/g, "" );// strip leading space
																																																																																																		    
																																																																																																		            trimmedResponseText = trimmedResponseText.replace( /\s+$/g, "" );// strip trailing
																																																																																																			    
																																																																																																			            if (trimmedResponseText != responseText)
																																																																																																				    
																																																																																																				                errorString += "\nYou have whitespace in your response.";
																																																																																																						
																																																																																																						        xajax.DebugMessage(errorString);
																																																																																																							
																																																																																																							        xajax.setCursor('default');
																																																																																																								
																																																																																																								        if (xajaxStatusMessages == true) xajax.setStatusMessages('Invalid XML response error');
																																																																																																									
																																																																																																									    };
																																																																																																									    
																																																																																																									        
																																																																																																									    
																																																																																																									        // overlay this if you need to
																																																																																																										
																																																																																																										    xajax.uploadSuccess = function()
																																																																																																										    
																																																																																																										        {
																																																																																																											
																																																																																																											        xajax.setCursor('default');
																																																																																																												
																																																																																																												    };
																																																																																																												    
																																																																																																												        
																																																																																																												    
																																																																																																												        xajax.createIframe = function(name,id)
																																																																																																													
																																																																																																													    {
																																																																																																													    
																																																																																																													            var iframe;
																																																																																																														    
																																																																																																														            if(!id)
																																																																																																															    
																																																																																																															            {
																																																																																																																    
																																																																																																																                id = '';
																																																																																																																		
																																																																																																																		        }
																																																																																																																			
																																																																																																																			        if(xajax.isIE) // for IE
																																																																																																																				
																																																																																																																				        {
																																																																																																																					
																																																																																																																					            iframe = document.createElement('<iframe id="'+id+'" name="'+name+'">');
																																																																																																																						    
																																																																																																																						            }
																																																																																																																							    
																																																																																																																							            else // for FF
																																																																																																																								    
																																																																																																																								            {
																																																																																																																									    
																																																																																																																									                iframe = document.createElement('iframe');
																																																																																																																											
																																																																																																																											            iframe.id = id;
																																																																																																																												    
																																																																																																																												                iframe.name = name;
																																																																																																																														
																																																																																																																														        }
																																																																																																																															
																																																																																																																															        iframe.width = '0';
																																																																																																																																
																																																																																																																																        iframe.height = '0';
																																																																																																																																	
																																																																																																																																	        iframe.style.display = 'none';
																																																																																																																																		
																																																																																																																																		        iframe.scrolling = 'no';
																																																																																																																																			
																																																																																																																																			        iframe.src = 'about:blank';
																																																																																																																																				
																																																																																																																																				        document.body.appendChild(iframe);
																																																																																																																																					
																																																																																																																																					        return iframe;
																																																																																																																																						
																																																																																																																																						    };
																																																																																																																																						    
																																																																																																																																						        return true;
																																																																																																																																							
																																																																																																																																							}
																																																																																																																																							
																																																																																																																																							xajax_extend();