var slEventListener = {
addLoadListener:function(fn) 
{
	if (typeof window.addEventListener != 'undefined')
	{
		window.addEventListener('load', fn, false);
	}
	else if (typeof document.addEventListener != 'undefined')
	{
		document.addEventListener('load', fn, false);
	}
	else if (typeof window.attachEvent != 'undefined')
	{
		window.attachEvent('onload', fn);
	}
	else
	{
		return false;
	}
	
	return true;
},
attachEventListener:function(target, eventType, functionRef, capture)
{
    if (typeof target.addEventListener != "undefined")
    {
        target.addEventListener(eventType, functionRef, capture);
    }
    else if (typeof target.attachEvent != "undefined")
    {
        target.attachEvent("on" + eventType, functionRef);
    }
    else
    {
        return false;
    }
    return true;
},
detachEventListener:function(target, eventType, functionRef,
   capture)
{
 if (typeof target.removeEventListener != "undefined")
 {
   target.removeEventListener(eventType, functionRef, capture);
 }
 else if (typeof target.detachEvent != "undefined")
 {
   target.detachEvent("on" + eventType, functionRef);
 }
 else
 {
   target["on" + eventType] = null;
 }
},
stopEvent:function(event)
{
 if (typeof event.stopPropagation != "undefined")
 {
   event.stopPropagation();
 }
 else
 {
   event.cancelBubble = true;
 }
}//end last function
}//end slListener class