function GetRequest(url) 
{
	/*
	通过XMLHttp对象获取数据
	*/
	//mf
    if (window.XMLHttpRequest) {
       var xmlHttp = new XMLHttpRequest();
       xmlHttp.open("POST",url,false);
	   xmlHttp.send(url); 
    }
    //ie
    else if (window.ActiveXObject) {
       var xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
       if(xmlHttp)
       {
       		xmlHttp.open("POST",url,false);
			xmlHttp.send(); 
       }
    }
	//服务器端处理返回的是经过escape编码的字符串. 
	return xmlHttp.responseText
}
function showmsg(id,msg)
{
	/*
	显示提示信息
	id:组件ID
	msg:显示内容
	*/
	document.getElementById(id).innerHTML=msg;
}
function trim(sString)
{
	/*
	去除空格
	str:字符串
	*/
    while (sString.substring(0,1) == ' ')
    {
        sString = sString.substring(1, sString.length);
    }
    while (sString.substring(sString.length-1, sString.length) == ' ')
    {
        sString = sString.substring(0,sString.length-1);
    }
    return sString;
}
function ovrTR(tr,color) 
{/*鼠标移上变背景色*/
	
	tr.bgColor = color;
}
function outTR(tr,color) 
{/*鼠标移开变背景色*/
	tr.bgColor = color;
}
function statstr(formname,size,viewmsg)
{
	/*
	统计TEXT文本框表单已输入多少个字
	formname：文本框名称
	size：最多可输入字符数
	showmsg：显示提示填写了字符数ID
	*/
	var errorInfo = "<img src='http://images.ejia.com/default/member/error.gif'>&nbsp;&nbsp;";
	var character = formname.value.length;
	var leavings = size-character;
	if(character > size)
	{
		showmsg(viewmsg,errorInfo+"评论字符数不能超过<font color=\"red\">"+size+"</font>个字符！");
		formname.value=formname.value.substr(0,size);
	}
	else
	{
		showmsg(viewmsg,"可发<font color='#ff0000'>" +size+ "</font>字符，已输<font color='#ff0000'>" +character+ "</font>字符，剩余<font color='#ff0000'>" +leavings+ "</font>字符！");
	}
}