function changeSource(iframeName, url) {
  if ( window.frames[iframeName] ) {
    window.frames[iframeName].location = url;   
    return false;
  }
  else return true;
}

function change(n)
	{ 
	
		xmlHttp=GetXmlHttpObject();
		if (xmlHttp==null)
	    {
		  alert ("Your browser does not support AJAX!");
		  return;
	    } 
		if (n==1)
			var url="contactus.html";
		else
		if(n==2)
			var url="download.html";
			
								
		xmlHttp.onreadystatechange=quesChanged;
		xmlHttp.open("GET",url,true);
		xmlHttp.send(null);
	}

	function quesChanged() 
	{ 
		if (xmlHttp.readyState<4)
		     document.getElementById("lpcontent").innerHTML="Loading...";
		if (xmlHttp.readyState==4)
		{ 
			document.getElementById("lpcontent").innerHTML=xmlHttp.responseText;	
		}	
	}
	
	
 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;
	}