// function to clear a text field onfocus
	function clearField(fieldName,defaultValue) {
	if(fieldName.value == defaultValue) {
		fieldName.value = "";
		}
	}
	// function to restore a text field onblur
	function setField(fieldName,defaultValue) {
	if(fieldName.value == "") {
		fieldName.value = defaultValue;
		}
	}