function getValue(url) 
{ 
    var xmlHttpRequest;
    var str="";
    if (window.XMLHttpRequest) //For general cases. 
    { 
        xmlHttpRequest = new XMLHttpRequest();
        xmlHttpRequest.open('post',url,false);
        xmlHttpRequest.setRequestHeader("Content-type","application/x-www-form-urlencoded;");
        xmlHttpRequest.send('');
        if(xmlHttpRequest.status==200) 
        str=xmlHttpRequest.responseText;
    } 
    else //For IE. 
    { 
        if (window.ActiveXObject) 
        { 
            xmlHttpRequest = new ActiveXObject("Microsoft.XMLHTTP"); 
            xmlHttpRequest.open("get",url,false);
            xmlHttpRequest.send();
            str=xmlHttpRequest.responseText;
        } 
    } 
    return str; 
}