Mask=new function(){this.maskDiv=null;this.loadingDiv=null;this.createMask=function(){var maskStr='<div id="loading" style="position:absolute;left:30%;top:30%;z-index:1001;display:none"><img src="img/loading.gif"></div><div id="mask" style="background:white;position:absolute;left:0;top:0;z-index:1000;display:none;filter:progid:DXImageTransform.Microsoft.Alpha(opacity=10);"></div>';this.maskDiv=document.getElementById("mask");this.loadingDiv=document.getElementById("loading");}
this.show=function(){}
this.hide=function(){}}
function createXmlhttp(){var xmlhttp=null;if(window.XMLHttpRequest){xmlhttp=new XMLHttpRequest();if(xmlhttp.overrideMimeType){xmlhttp.overrideMimeType("text/xml");}}
else if(window.ActiveXObject){try{xmlhttp=new ActiveXObject("Msxml2.XMLHTTP");}catch(e){xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");}}
if(!xmlhttp){window.alert("Your broswer not support XMLHttpRequest!");}
return xmlhttp;}
function postData(surl,params,callback,failCallback,noMask,sync){if(!sync)async=true;else async=false;if(!noMask)Mask.show();var xmlhttp;xmlhttp=createXmlhttp();xmlhttp.open("POST",surl,async);if(async){xmlhttp.onreadystatechange=function(){if(xmlhttp.readyState==4){if(xmlhttp.status==200||xmlhttp.status==304){callback(xmlhttp);}
else{if(failCallback){try{failCallback(xmlhttp,params)}catch(error){};}
else{}}
if(!noMask)Mask.hide();}};}
xmlhttp.setRequestHeader("Content-Length",params?params.length:0);xmlhttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded");xmlhttp.send(encodeURI(params));if(sync){if(xmlhttp.readyState==4){if(xmlhttp.status==200||xmlhttp.status==304){callback(xmlhttp);}
else{if(failCallback){try{failCallback(xmlhttp)}catch(error){};}
else{window.alert("Error loading page\n"+xmlhttp.status+":"+xmlhttp.statusText);}}
if(!noMask){Mask.hide();}}}}
function getData(surl,params,callback,failCallback,noMask,sync){if(!sync)async=true;else async=false;if(!noMask)Mask.show();var xmlhttp;xmlhttp=createXmlhttp();xmlhttp.open("GET",surl,async);xmlhttp.setRequestHeader("If-Modified-Since","Last-Modified");if(async){xmlhttp.onreadystatechange=function(){if(xmlhttp.readyState==4){if(xmlhttp.status==200||xmlhttp.status==304){callback(xmlhttp);}
else{if(failCallback){try{failCallback(xmlhttp,params)}catch(error){};}
else{}}
if(!noMask)Mask.hide();}};}
xmlhttp.send(null);if(sync){if(xmlhttp.readyState==4){if(xmlhttp.status==200||xmlhttp.status==304){callback(xmlhttp);}
else{if(failCallback){try{failCallback(xmlhttp)}catch(error){};}
else{window.alert("Error loading page\n"+xmlhttp.status+":"+xmlhttp.statusText);}}
if(!noMask){Mask.hide();}}}}
function getUrlContent(surl){var xmlhttp=createXmlhttp();var rsContent=null;xmlhttp.open("GET",surl,false);xmlhttp.setRequestHeader("If-Modified-Since","Last-Modified");xmlhttp.send(null);if(xmlhttp.readyState==4){if(xmlhttp.status==200||xmlhttp.status==304){rsContent=xmlhttp.responseText;return rsContent;}
else{return null;}}}