function checkComplete() {  
var alert_message = "";

if (isEmpty(window.document.search.searchText.value)) {
	alert_message = "Please enter keywords to use in the search.";
}

if (alert_message) { 
	alert (alert_message);
	return false;
} else { 
	return true;
}
}

function isEmpty (strValue) {
	return (! strValue.replace (/^(\s*)/, "", strValue));
}