function setSearchText(){
	if($("nav_Search_Input")){
		var searchField = $("nav_Search_Input");
		if (searchField.value == ""){
			searchField.value = "search";
		}
	
		Event.observe($("nav_Search_Input"), "click", emptytext);
		Event.observe($("nav_Search_Input"), "blur", emptytext);
	}
}

function emptytext(){
	var searchField = $("nav_Search_Input");
	if (searchField.value == "search"){
		searchField.value = "";
	}else if(searchField.value == ""){
		searchField.value = "search";
	}
}

Event.observe(window,"load",function() {setSearchText();});