//创建XMLHttpRequest

function getRequest() {

        http_request = false;

        if (window.XMLHttpRequest) {
                //对于Mozilla、Netscape、Safari等浏览器，创建XMLHttpRequest
                http_request = new XMLHttpRequest();
                if (http_request.overrideMimeType) {
                        //如果服务器响应的header不是text/xml，可以调用其它方法修改该header
                        http_request.overrideMimeType('text/xml');
                }
        } else if (window.ActiveXObject) {
                // 对于Internet Explorer浏览器，创建XMLHttpRequest
                try {
                        http_request = new ActiveXObject("Msxml2.XMLHTTP");
                } catch (e) {
                        try {
                                http_request = new ActiveXObject("Microsoft.XMLHTTP");
                        } catch (e) {}
                }
        }
        return http_request;
}

//初始化隐藏DIV
function sTag(tId,cId)
{
    var objL = document.getElementById(tId).getElementsByTagName("li");
    
    objL[0].className = 'tover';
    for(i=1;i<objL.length;i++)
    {
       document.getElementById(cId+i).style.display = 'none';
       objL[i].className = 'tout';
       
    }    
}

//处理onmouseover
function selTag(tId,cId,sid)
{
    var objL = document.getElementById(tId).getElementsByTagName("li");
   
    objL[sid].className = 'tover';
    document.getElementById(cId+sid).style.display = 'block';
    for(i=0;i<objL.length;i++)
    {
        if(i != sid)
        {
        objL[i].className = 'tout';
        document.getElementById(cId+i).style.display = 'none';
        }
    }
}


//获取服务器返回数据

function getResponseText(url,tid)
{
	var http_request=getRequest();
    var tobj = document.getElementById(tid);
    tobj.innerHTML = "<img style='vertical-align:middle;' src=/Comm_Images/indicator_arrows.gif />&nbsp;正在加载...";	
	http_request.onreadystatechange=function()
	{
	        if (http_request.readyState == 4)
		    {
				if (http_request.status == 200) 
				{
					tobj.innerHTML = http_request.responseText;
				}
			　　else
			　　{
		　　　　    tobj.innerHTML = "程序加载出错!";
	　　　      }
　　        }
	}
	http_request.open('GET', url, true);
	http_request.send(null);	
}