function clearField(field) {
	if( field.value != '' ) {
		field.value = '';
	}
}

function openWindow(theURL, winName, w, h, features) {
	windowFeatures = "width=" + w + ",height=" + h + "," + features;
	newWindow = window.open(theURL, winName, windowFeatures);
	newWindow.resizeTo(w, h);
	if (window.focus) { newWindow.focus() }
}

function showImage(url) {
	openWindow("/image.php?" + url + "", "photo", '800', '600', "resizable=1");
}