html ajax

function getUrl(){

    var url = location.search;
    url = url.substring(1,url.length);

    xmlhttp = new ActiveXObject("MSXML2.XMLHTTP")
    xmlhttp.Open("GET", "../Ajax.aspx?oper=p_style&"+url, false);
    xmlhttp.onreadystatechange= HandleStateChange;
    xmlhttp.send();
}
function HandleStateChange()
{
  if (xmlhttp.readyState == 4)
  {
    var re;
    re = /=/g;
    p = eval("(" + xmlhttp.responseText.replace(re,"'") + ")");
   
    $("pname").innerText= p.pname;
 $("pauthor").innerText= p.pauthor;
 $("pcopyright").innerText= p.pcopyright;
 $("pinfo").innerText= p.pinfo;
  }
}