/*
	general.js
	v0.1, 2008-07-15
	Oleksandr
*/
function getElement(id) {
	return document.getElementById(id);
}

function getBody() {
	return document.getElementsByTagName("body")[0];
}

function setOnload(f) {
	var
		onloadPrevious = window.onload;
	if (typeof(window.onload) != "function") {
		window.onload = f;
	} else {
		window.onload = function() {
			onloadPrevious();
			f();
		}
	}
}

function getCoordinates(id) {
	var
		id = getElement(id);

	var
		left = id.offsetLeft,
		top = id.offsetTop;
		
	for (var parent = id.offsetParent; parent; parent = parent.offsetParent) {
		left += parent.offsetLeft - parent.scrollLeft;
		top += parent.offsetTop - parent.scrollTop;
	}
	
	return {
		width: id.offsetWidth,
		height: id.offsetHeight,
		left: left,
		top: top
	};
}