//add an onload event
function addOnLoadEvent(onloadToAdd){
	var prevOnLoad = window.onload;	
	if(typeof window.onload != 'function'){
		window.onload = onloadToAdd;
	} else {
		window.onload = function(){
		if(prevOnLoad){
			prevOnLoad();
		}
		onloadToAdd();
		}
	}

}