var http_request = false;
   function makeRequestGeneral(url, parameters, slash) {
      http_request = false;
      if (window.XMLHttpRequest) { // Mozilla, Safari,...
         http_request = new XMLHttpRequest();
         if (http_request.overrideMimeType) {
         	// set type accordingly to anticipated content type
            //http_request.overrideMimeType('text/xml');
            http_request.overrideMimeType('text/html');
         }
      } else if (window.ActiveXObject) { // IE
         try {
            http_request = new ActiveXObject("Msxml2.XMLHTTP");
         } catch (e) {
            try {
               http_request = new ActiveXObject("Microsoft.XMLHTTP");
            } catch (e) {}
         }
      }
      if (!http_request) {
         alert('Cannot create XMLHTTP instance');
         return false;
      }

      http_request.onreadystatechange = alertContentsForNewsLetter;
	  document.getElementById("displayMessage").innerHTML="<img style='paddding-left:50px;padding-top:10px' src='"+slash+"images/ajax-loader.gif'> processing request..";
	  window.setTimeout('howToShowResult()',2000,'javascript');  
      http_request.open('GET', url + parameters, true);
      http_request.send(null);      
   }

   function alertContentsForNewsLetter() {
      if (http_request.readyState == 4) {
         if (http_request.status == 200) {
            result = http_request.responseText;			 
         } else {
            alert('There was a problem with the request.');
         }
      }
   }
   //change this function name as your reqirement
   function signup_to_getNewsLetter(slash) {	if(/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(document.getElementById("email_newsletter").value)){	 
	var getstr = "?";
   getstr += "email_newsletter=" +  document.getElementById("email_newsletter").value + "&"; 
   makeRequestGeneral(''+slash+'php/ajax_get_newsletter_result.php', getstr, slash);
   return (true)	
	}
	alert("Invalid E-mail Address! Please re-enter.")
    document.getElementById("email_newsletter").focus();
	return (false)
}


function howToShowResult(){
document.getElementById("displayMessage").innerHTML=result;
$('#newsletterdiv').slideUp(500);
$('#displayMessage').highlightFade({
			speed:1500
			});
}