function EL(id) {
	if (document.getElementById)
		return document.getElementById(id);
	else if (document.all)
		return document.all[id];
	else if (document.layers)
		return document.layers[id];
}
function changeImg(id, url) {
	EL(id).src = url;
}

function focusForm(obj, str) {
	if (obj.value == str) {
		obj.value = '';
	}
}
function blurForm(obj, str) {
	if (obj.value == '') {
		obj.value = str;
	}
}