var xmlHttp

function trim(param) 
{ 
	return param.replace(/^\s+|\s+$/g,""); 
}

function Get_Message(param_url)
{
  xmlHttp=GetXmlHttpObject()

  if (xmlHttp==null)
    {
    alert ("No AJAX");
    return;
    }	
   if (trim(param_url)=="")
   {
       alert("data is not valid.");
	   return false;
   }

  var url=param_url;   
  xmlHttp.onreadystatechange=function()
  {     
  	if (xmlHttp.readyState==4)
	  {// 4 = "loaded"
		  if (xmlHttp.status==200)
			{// 200 = "OK"	
			//alert(xmlHttp.responseText);		  						   
			  if (parseInt(xmlHttp.responseText)==0)
			  {
			  	 document.form1.submit();
			  }	
			  else
			  {			  	
				 document.getElementById("table_value").innerHTML=xmlHttp.responseText;
			  }
			}
		  else
			{
			alert("Problem retrieving data:" + xmlhttp.statusText);
			}
	  } 
  }
  xmlHttp.open("GET",url,true);
  xmlHttp.setRequestHeader("If-Modified-Since","0");	
  xmlHttp.send(null); 
} 

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;
}