var dID;

function makeRequest(URL,txt) {

	dID=txt;

	document.getElementById("plzwait"+txt).innerHTML="Please Wait...";

	c=document.getElementById("txt"+txt).value;

	URL=URL+"&quant="+c+"&rnd="+Math.random();

	http_request = false;

	if (window.XMLHttpRequest) { // Mozilla, Safari,...

		http_request = new XMLHttpRequest();

		if (http_request.overrideMimeType) {

			http_request.overrideMimeType('text/xml');

			// See note below about this line

		}

	} 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('Giving up :( Cannot create an XMLHTTP instance');

		return false;

	}

	http_request.onreadystatechange = alertContents;

	http_request.open('GET', URL, true);

	http_request.send(null);



}



function alertContents()

{

	if (http_request.readyState == 4) {

		if (http_request.status == 200) 

		{

			document.getElementById("plzwait"+dID).innerHTML=http_request.responseText;

			//alert(http_request.responseText);

		} 

		else {

			alert('There was a problem with the request.');

		}

	}

}



function IsNumeric(o)

{

	 var sText=o.value;

   var ValidChars = "0123456789";

   var IsNumber=true;

   var Char;



 

   for (i = 0; i < sText.length && IsNumber == true; i++) 

      { 

      Char = sText.charAt(i); 

      if (ValidChars.indexOf(Char) == -1) 

         {

         IsNumber = false;

         }

      }

   

   if(IsNumber == false || sText=="") 

   {

   	o.focus();

   	alert("Invalid Quentity value.");

  }

   return IsNumber;   

}