var strZoek = "Zoek op deze site";

function checkSearchString(searchField)
{
	if (searchField.value == "") {
       	searchField.value = strZoek;
       	searchField.style.color = "#999";
	}else searchField.style.color = "#000";
}

function clearSearchField(searchField){
	if (searchField.value == strZoek)
		searchField.value = "";
	searchField.style.color = "#000";
}