// JavaScript Document
function validate(form) {   
	var str = "Elements of form " + form.name + ": \n ";   
	for (i = 0; i < form.length; i++) {    
		if ((form.elements[i].type == "text" || form.elements[i].type == "password") 
			&& form.elements[i].name.indexOf("_") != -1 && form.elements[i].value == "") {
			form.elements[i].focus();
			alert( "The form field " + form.elements[i].name.replace("_", "") + " needs to be filled in.");
			return false;
		}
	}
	return true;
}