function returnObjById(id)
{
		if (document.getElementById)
			var returnVar = document.getElementById(id);
		else if (document.all)
			var returnVar = document.all[id];
		else if (document.layers)
			var returnVar = document.layers[id];
		return returnVar;
}

function hasClass(ele, cls)
{
	return ele.className.match(new RegExp('(\\s|^)'+cls+'(\\s|$)'));
}

function addClass(ele,cls)
{
	if (!this.hasClass(ele,cls)) ele.className += " "+cls;
}

function removeClass(ele,cls)
{
	if (hasClass(ele,cls)) {
		var reg = new RegExp('(\\s|^)'+cls+'(\\s|$)');
		ele.className=ele.className.replace(reg,' ');
	}
}