var sUserAgent=navigator.userAgent;
var isIE=sUserAgent.indexOf("compatible")>-1 && sUserAgent.indexOf("MSIE")>-1;	//判断是否ie

function changeText(objID,text)
{
	document.getElementById(objID).innerText=text;
}
function changeHTML(objID,HtmlText)
{
	//alert (HtmlText);
	document.getElementById(objID).innerHTML=HtmlText;
}


//XMLHttpRequest生成
function initXmlHttp()
{
	try {
	this.xmlhttp = new XMLHttpRequest();
		} catch (e) {
					var XMLHTTP_IDS = new Array(
						'MSXML2.XMLHTTP.5.0',
						'MSXML2.XMLHTTP.4.0',
						'MSXML2.XMLHTTP.3.0',
						'MSXML2.XMLHTTP',
						'Microsoft.XMLHTTP' );
					var success = false;
					for (var i=0;i < XMLHTTP_IDS.length && !success; i++) 
					{
						try {
							this.xmlhttp = new ActiveXObject(XMLHTTP_IDS[i]);
							success = true;
							} catch (e) {}
					}
					if (!success) 
					{
						try{
								this.xmlhttp = new HTML_AJAX_IframeXHR();
								this.request.iframe = true;
							} catch(e) {
										throw new Error('出现错误：不能创建XMLHttpRequest对象，请联系开发人员！');
										}
					}
					}
}

//xmlhttprequest 检查返回状态
function checkRequest(xml_b) //xml: xmlhttprequest
{
	if (xml_b.xmlhttp.readyState==4)
	{
		if (xml_b.xmlhttp.status==200)
			{
				xmldom=xml_b.xmlhttp.responseXML;
				if (xmldom.parseError.errorCode != 0) 
				{
	 				var myErr = xmldom.parseError;
	   				throw new Error("出现错误： " + myErr.reason +"\n请联系开发人员！");
	   				return false;
				}
				else
				{
					return xmldom;
				}
			}
	}
	return false;
}