var xmlHttp

function showUser1(str1,str2,relative_path,pagNr){ 
    xmlHttp=GetXmlHttpObject();
    if (xmlHttp==null){
        alert ("Browser does not support HTTP Request");
        return;
    }

    var url="viewer/showComments.jsp";
    url=url+"?com="+str1+"&id="+str2+"&relative_path="+relative_path+"&pagNr="+pagNr;
    url=url+"&sid="+Math.random();
    xmlHttp.onreadystatechange=stateChanged ;
    xmlHttp.open("GET",url,true);
    xmlHttp.send(null);

    return false;
}

function stateChanged(){ 
    if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete"){ 
        document.getElementById("messageList").innerHTML=xmlHttp.responseText 
    } 
}

function GetXmlHttpObject(){
    var xmlHttp=null;
    try {
        // Firefox, Opera 8.0+, Safari
        xmlHttp=new XMLHttpRequest();
    }catch (e){
        //Internet Explorer
        try{
            xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
        }catch (e){
            xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
        }
    }
    return xmlHttp;
}