/**
 * DHTML email validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/)
 */
function echeck(str) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)

		if (str.indexOf(at)==-1){
		   alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==(lstr-1)){
		   alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==(lstr-1)){
		    alert("Invalid E-mail ID")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    alert("Invalid E-mail ID")
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		    alert("Invalid E-mail ID")
		    return false
		 }

 		 return true					
	}

function validateEMailID(emailID) {
	
	if ((emailID.value==null)||(emailID.value=="")){
		alert("Please enter your Email ID")
		emailID.focus()
		return false
	}

	if (echeck(emailID.value)==false){
		// emailID.value=""
		emailID.focus()
		return false
	}

	return true
 }

function onSubscribe()
{

  var emailID = document.subscribeForm.emailID

  if (validateEMailID(emailID) == false) {
    return;
  }

  var xmlHttp;
  try
  {  // Firefox, Opera 8.0+, Safari  
     xmlHttp=new XMLHttpRequest();  
  } catch (e) 
  {  
    // Internet Explorer  
    try
    {    
      xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");    
    } catch (e) 
    {    
      try 
      {      
        xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");      
      } catch (e) 
      {      
         alert("Your browser does not support AJAX!");      
         return false;      
      }    
    }  
  }
  xmlHttp.onreadystatechange=function()
  {
      if(xmlHttp.readyState==4)
      {
        alert(trim(xmlHttp.responseText));      
        // Reset the form
        document.subscribeForm.emailID.value="";        
      }
  }

  xmlHttp.open("POST","subscribe_nessp.php",true);
  xmlHttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
  parameters = "emailID=" + encodeURI(document.subscribeForm.emailID.value)
  xmlHttp.setRequestHeader("Content-length", parameters.length);
  xmlHttp.send(parameters);

}

function trim(str)
{  
  return str.replace(/^\s+|\s+$/g,"");
}