// global var
val_searchbox = null;

function searchBox(id, toggle) {
	var elem = document.getElementById(id);
	
	if ((elem != null || elem != 'undefined')) {
		if (toggle) {
			//onfocus
			if (val_searchbox == null) { // first call
				val_searchbox = elem.value;
			}
			if (elem.value == val_searchbox) { // clear field
				elem.value = '';
				elem.className = '';
			}
		} else {
			if (elem.value == '') { // onblur
				elem.className = 'empty';
				elem.value = val_searchbox;
			}
		}
	}
}