var comm_counter=0; var comm_instances=[]; var showCommunicator = 0; function Communicator(nextAction) { this.id = 0; this.url = ""; this.method = "get"; this.responseText = ""; this.xmlDoc ; this.xhttpObject; this.status = null; this.docTitle = null; this.error = null; this.nextAction = nextAction; this.attributes = {}; //these attributes will be passed to the instance and returned with the instance to the callback method this.getTable = function (table_name, prefix) { if(this.xmlDoc==null) // || this.xmlDoc.tagName==null || this.xmlDoc.tagName.toLowerCase()!="xml") return null; if(!prefix) prefix = "MetaData"; return this.xmlDoc.selectNodes(prefix + "/"+ table_name); } this.getRow = function (table_name, prefix) { if(this.xmlDoc==null) // || this.xmlDoc.tagName==null || this.xmlDoc.tagName.toLowerCase()!="xml") return null; if(!prefix) prefix = "MetaData"; return this.xmlDoc.selectSingleNode(prefix + "/"+ table_name); } this.open=function(method,url) { this.id=++comm_counter; // id number of this request this.url=url; this.method = method; var objXMLHttp=null; if (window.XMLHttpRequest)objXMLHttp=new XMLHttpRequest(); else if (window.ActiveXObject) objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP"); this.xhttpObject=objXMLHttp; } this.send=function(postdata) { var url=this.url; comm_instances[this.id]=this; var commstate=new CommunicatorCheckState(this.id); this.xhttpObject.onreadystatechange=commstate.statechanged; this.xhttpObject.open(this.method,url,true); this.xhttpObject.setRequestHeader('Content-Type','application/x-www-form-urlencoded'); var poststr=""; if(typeof(postdata)=="object" && postdata.length>0) { for(p in postdata) { poststr+=p+"="+postdata[p]+"&"; } postdata=poststr; } this.xhttpObject.send(postdata); } this.onreadystatechange=function() { comm_instances[this.id].attributes = this.attributes; setTimeout("try{" + this.nextAction + "(comm_instances[" + this.id + "]);}catch(err){}", 0); return false; } } function CommunicatorCheckState(parID) { var parentId=parID; this.statechanged=function() { //for (prop in this) alert(prop); //alert(this.protoy); //alert(comm_instances[parentId].xhttpObject.readyState); if(comm_instances[parentId].xhttpObject.readyState==4) { var reqstatus=0; try{reqstatus=comm_instances[parentId].xhttpObject.status;} catch(e){reqstatus=0;} if(reqstatus==200 || reqstatus==0) { xml=comm_instances[parentId].xhttpObject.responseText; xml = xml.replace("",""); xml = xml.replace("",""); if (window.ActiveXObject) { comm_instances[parentId].xmlDoc=new ActiveXObject("Microsoft.XMLDOM"); comm_instances[parentId].xmlDoc.async=false; xml = String(xml).replace(/&/ig, "&"); comm_instances[parentId].xmlDoc.loadXML(xml); } else if(document.implementation.createDocument) { var parser=new DOMParser(); comm_instances[parentId].xmlDoc=parser.parseFromString(xml,"text/xml"); } if(comm_instances[parentId].xmlDoc.documentElement!=null) comm_instances[parentId].xmlDoc= comm_instances[parentId].xmlDoc.documentElement; for(i=0;i