function pd(url,data,callback)
{
    var xhr=false;
    if(window.XMLHttpRequest)
    {
        xhr = new XMLHttpRequest();
    }else if(window.ActiveXObject){
        xhr = new ActiveXObject("Microsoft.XMLHTTP");
    }
    
    if(xhr){
	document.getElementById('dv').innerHTML="<center><img src='inc/wait.gif' border='0' /></center>";
        xhr.open("POST",url);
        xhr.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
  
    xhr.onreadystatechange=function ()
    {
        
        if(xhr.readyState==4 && xhr.status==200){
            callback(xhr.responseText);
            delete xhr;
            xhr=null;
        }
        
    }
    xhr.send(data);
}
}

function dek(e)
{
     var key;
     if(window.event)
          key = window.event.keyCode;
     else
          key = e.which;
     return (key != 13);
}

function display(text)
{
     document.getElementById('dv').innerHTML=text; 
}