function GetXmlHttpObject(){ 
	var objXMLHttp=null 
	if (window.XMLHttpRequest){ 
	objXMLHttp=new XMLHttpRequest() 
	}else if (window.ActiveXObject){ 
	objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP") 
	} 
	return objXMLHttp 
	} 
function trim(s) {
	   var temp = s;
	   return temp.replace(/^\s+/,'').replace(/\s+$/,'');
} 

/* function to check username availability while inserting new user */	
function output(){     
	  var xmlHttp;
	  xmlHttp=GetXmlHttpObject() 
	  if (xmlHttp==null)
	  { 
	  alert ("Browser does not support HTTP Request") 
	  return 
	} 
	
	 xmlHttp.onreadystatechange = function () { 
	if (xmlHttp.readyState == 4) {
	  if(xmlHttp.responseText){
		  
		  document.getElementById('output').innerHTML = xmlHttp.responseText;
	  }
	} 
}; 
       var price   = trim(document.getElementById('price').value);
	  var height      =trim(document.getElementById('height').value);
	  var width      =trim(document.getElementById('width').value);
	  var url="output.php?price="+price+"&height="+height+"&width="+width; 

	xmlHttp.open("GET",url,true) 
	xmlHttp.send(null);
} 





function validation(){
	var price   = trim(document.getElementById('price').value);
	 var height      =trim(document.getElementById('height').value);
	 var width      =trim(document.getElementById('width').value);
}