/*Author:david/董旭华(dongxuhua@yahoo.com)*/
function gd(id){return document.getElementById(id);}
//是否IE
function isIe(){
var browserCls=navigator.userAgent.toLowerCase().indexOf("msie");
return browserCls>=0;
}
//是否Firefox
function isFirefox(){
var browserCls=navigator.userAgent.toLowerCase().indexOf("firefox");
return browserCls>=0;
}
//IE中创建DOMDocument对象
function createDomDoc(){
var signatures=["Msxm12.DOMDocument.5.0","Msxm12.DOMDocument.4.0","Msxm12.DOMDocument.3.0","Msxm12.DOMDocument","Microsoft.XmlDom"];
for(var i=0;i<signatures.length;i++){
try{var domDoc=new ActiveXObject(signatures[i]);return domDoc;}catch(e){}
}
return null;
}
//创建浏览器兼容的xmlhttp对象
function createxmlhttp(){
var xmlhttp;
try{xmlhttp=new ActiveXObject('Msxml2.XMLHTTP');return xmlhttp;}catch(e){try{
xmlhttp=new ActiveXObject('Microsoft.XMLHTTP');
return xmlhttp;
}catch(e){
try{xmlhttp=new XMLHttpRequest();return xmlhttp;}catch(e){}}}
return null;
}
//清除因浏览器而异的空白结点
function cleanWhitespace(element){
for(var i=0;i<element.childNodes.length;i++){
var node=element.childNodes[i];
if(node.nodeType==3 && !/\S/.test(node.nodeValue))
node.parentNode.removeChild(node);
}
}
//取地址栏参数
function get(key){
var value="";    
var sURL=window.document.URL;
if (sURL.indexOf("?")>0){
var arrayParams=sURL.split("?");       
var arrayURLParams=arrayParams[1].split("&");       
for (var i=0;i<arrayURLParams.length;i++){
var sParam=arrayURLParams[i].split("=");          
if((sParam[0] == key) && (sParam[1] != "")){
value=sParam[1];
break;
}
}  
}
return value;
}