ajax.Request 
function ajaxRequest(url) 
{
 
  var aj = new Ajax.Request(
  url, {
   method:'get', 
   parameters: {rssLink: $F('RssLink'), textColor: $F('TextColor'), timeLeftColor: $F('TimeLeftColor'), bgColor: $F('BackgroundColor'), bdrColor: $F('BorderColor'), hvTextColor: $F('HoverTextColor'), hvTimeLeftColor: $F('HoverTimeLeftColor'), hvBgColor: $F('HoverBackgroundColor'), hvBdrColor: $F('HoverBorderColor'), pgTextColor: $F('PaginationTextColor'), pgAlternateColor: $F('PaginationAlternateColor'), count: 1},
    onComplete: getResponse
   }
  );
  var goodURL = /http:\/\/rss.api.ebay.com\/ws\/rssapi?/i.test($F('RssLink'));
  if (goodURL)
  {
	   $('errMsg').innerHTML = "";
  }
  else
  {
	   $('errMsg').innerHTML = "Not so fast! Please enter a valid feed URL.";
	   $('RssLink').focus();
  }
}

function getResponse(oReq) {
  $('preview').innerHTML = oReq.responseText;
}
function checkURL()
{	
	var goodURL = /http:\/\/rss.api.ebay.com\/ws\/rssapi?/i.test($F('RssLink'));
	if (goodURL)
	{
		$('errMsg').innerHTML = "";
		document.rssform.submit();	
	}
	else
	{
		   $('errMsg').innerHTML = "Not so fast! Please enter a valid feed URL.";
		   $('RssLink').focus();
	}
}

function disableEnterKey(e)
{
     var key;      
     if(window.event)
          key = window.event.keyCode; //IE
     else
          key = e.which; //firefox      

     return (key != 13);
}