var isIE = document.all ? true : false;
	var isSearchChanged = false;

	function getLayer(layerName) {
		if (isIE) {
			return document.all[layerName];
		} else {
			return document.getElementById(layerName);
		}
	}

	function SiteSearchClearDefault(el) {
		if (el)
			if (el.value == "") {
				el.value = "Zoek";
				isSearchChanged = false;
			} else {
				if ((el.value == "Zoek") && !isSearchChanged) {
					el.value = "";
				}
			}
	}

	function SiteSearchChanged() {
		isSearchChanged = true;
	}
	
	function ValidateSearch() {
		if (isSearchChanged)
			return true;
		else
			return false;
	}