NS4 = (document.layers) ? true : false;

function checkEnter(event)
{
	var code = 0;

	if (NS4)
		code = event.which;
	else
		code = event.keyCode;
	if (code==13)
		form.submit();
}

function trim(s){
	s = s.replace(/^\s*/, '');
    s = s.replace(/\s*$/, '');
    return s;
}

function validateText(field, label){

	var s;
    s = trim(field.value);

	if (s.length > 0) {
    	return true;
    } else {
    	alert(label + ' is a required field.');
        field.focus();
    	return false;
    }
}

function validateDropdown(field, label){

	i = field.selectedIndex;

	if (i != 0) {
    	return true;
    } else {
    	alert(label + ' is a required field.');
        field.focus();
    	return false;
    }
}