/**
 * addFunctionToOnLoad: Add a function to document.onLoad
 * @param	$f:Function
 */
function addFunctionToOnLoad($f)
{
	if (window.addEventListener){
		window.addEventListener("load", $f, false);
		return true;
	} else if (window.attachEvent){
		var ol = window.attachEvent("onload", $f);
		return ol;
	} else {
		return
	}
}