var net=new Object();net.READY_STATE_UNINITIALIZED=0;net.READY_STATE_LOADING=1;net.READY_STATE_LOADED=2;net.READY_STATE_INTERACTIVE=3;net.READY_STATE_COMPLETE=4; net.ContentLoader=function(url,onload,onerror,method,params,contentType){this.req=null;net.currentLoader=this;this.onload=onload;this.onerror=(onerror)?onerror:this.defaultError;this.loadXMLDoc(url,method,params,contentType);};net.ContentLoader.prototype.loadXMLDoc=function(url,method,params,contentType){if(!method){method="GET";};if(!contentType&&method=="POST"){contentType='application/x-www-form-urlencoded';};if(window.XMLHttpRequest){this.req=new XMLHttpRequest();}else if(window.ActiveXObject){this.req=new ActiveXObject("Microsoft.XMLHTTP");};if(this.req){try{var loader=this;this.req.onreadystatechange=function(){net.ContentLoader.onReadyState.call(loader);};this.req.open(method,url,true);if(contentType){this.req.setRequestHeader('Content-Type',contentType);};this.req.send(params);}catch(err){this.onerror.call(this);}}};net.ContentLoader.onReadyState=function(){var req=this.req;var ready=req.readyState;if(ready==net.READY_STATE_COMPLETE){var httpStatus=req.status;if(httpStatus==200||httpStatus==0){this.onload.call(this);}else{this.onerror.call(this);}}};net.ContentLoader.prototype.defaultError=function(){alert("error fetching data!"+"\n\nreadyState:"+this.req.readyState+"\nstatus: "+this.req.status+"\nheaders: "+this.req.getAllResponseHeaders());} ;net.cmdQueues=new Array();net.CommandQueue=function(id,url,onUpdate,freq){this.id=id;net.cmdQueues[id]=this;this.url=url;this.queued=new Array();this.sent=new Array();this.onUpdate=onUpdate;if(freq){this.repeat(freq);};this.lastUpdateTime=0;};net.CommandQueue.STATUS_QUEUED=-1;net.CommandQueue.STATE_UNINITIALIZED=net.READY_STATE_UNINITIALIZED;net.CommandQueue.STATE_LOADING=net.READY_STATE_LOADING;net.CommandQueue.STATE_LOADED=net.READY_STATE_LOADED;net.CommandQueue.STATE_INTERACTIVE=net.READY_STATE_INTERACTIVE;net.CommandQueue.STATE_COMPLETE=net.READY_STATE_COMPLETE;net.CommandQueue.STATE_PROCESSED=5;net.CommandQueue.PRIORITY_NORMAL=0;net.CommandQueue.PRIORITY_IMMEDIATE=1;net.CommandQueue.prototype.addCommand=function(command){if(this.isCommand(command)){this.queue.append(command,true);if(command.priority==net.CommandQueue.PRIORITY_IMMEDIATE){this.fireRequest();}}};net.CommandQueue.prototype.fireRequest=function(){if(!this.onUpdate&&this.queued.length==0){return;};var data="lastUpdate="+this.lastUpdateTime+"&data=";for(var i=0;i<this.queued.length;i++){var cmd=this.queued[i];if(this.isCommand(cmd)){data+=cmd.toRequestString();this.sent[cmd.id]=cmd;}};this.queued=new Array();this.loader=new net.ContentLoader(this.url,net.CommandQueue.onload,net.CommandQueue.onerror,"POST",data);};net.CommandQueue.prototype.isCommand=function(obj){return(obj.implementsProp("id")&&obj.implementsProp("priority")&&obj.implementsFunc("toRequestString")&&obj.implementsFunc("parseResponse"));};net.CommandQueue.onload=function(){var xmlDoc=this.req.responseXML;var elDocRoot=xmlDoc.getElementsByTagName("responses")[0];var lastUpdate=elDocRoot.attributes.getNamedItem("updateTime");if(parseInt(lastUpdate)>this.lastUpdateTime){this.lastUpdateTime=lastUpdate;};if(elDocRoot){for(i=0;i<elDocRoot.childNodes.length;i++){elChild=elDocRoot.childNodes[i];if(elChild.nodeType==1){if(elChild.tagName=="command"){var attrs=elChild.attributes;var id=attrs.getNamedItem("id").value;var command=net.commandQueue.sent[id];if(command){command.parseResponse(elChild);}}else if(elChild.tagName=="update"){if(this.implementsFunc("onUpdate")){this.onUpdate.call(this,elChild);}}}}}};net.CommandQueue.onerror=function(){alert("problem sending the data to the server");};net.CommandQueue.prototype.repeat=function(freq){this.unrepeat();if(freq>0){this.freq=freq;var cmd="net.cmdQueues["+this.id+"].fireRequest()";this.repeater=setInterval(cmd,freq*1000);}};net.CommandQueue.prototype.unrepeat=function(){if(this.repeater){clearInterval(this.repeater);};this.repeater=null;}