function setStyleById(i, p, v) {
	var n = document.getElementById(i);
	if( n )
	n.style[p] = v;
}

function validate_field(thisfield) {
	if (thisfield.value == "") {
		setStyleById("form_"+(thisfield.name),"color","red");
		++validation_errors;
	} else {
		setStyleById("form_"+(thisfield.name),"color","black");
	}
}

function validate_clear_field(thisfield) {
		setStyleById("form_"+(thisfield.name),"color","black");
}