/* (c) 2008 Mark Tomsu */

function empty(v) {
	return (typeof(v) == 'undefined' || v == null || v == false || v == 0 || v == '') ? true : false;
}

function go(u) {
	if (typeof(u) != 'undefined' && u != '' && u != null)
		window.location.href = u;
}

// wait, default, progress, etc
function setCursor(c) {
	if (empty(c))
		c = 'default';
  document.body.style.cursor = c;
}

function setFocus(form_name, element_name) {
	document.forms[form_name].elements[element_name].focus();
}

function swapImage(obj, new_image) {
	obj.src = new_image;
}

function popUp(u, n, w, h, params) {
	if (empty(params))
		params = 'location=no,menubar=no,scrollbars=yes,status=no,titlebar=yes,toolbar=no,resizable=yes,directories=no';
	params += ',width=' + w.toString() + ',height=' + h.toString();
	window.open(u, n, params);
}