function openWindow (url, windowName) {
	if (url != '') {
		   window.open(url, windowName);
   	}
}

var onload_list = new Array()

function onload_add(f) {
	onload_list[onload_list.length] = f
}

function onload_invoke() {
	for (var i = 0; i < onload_list.length; i++) {
		onload_list[i]()
	}
}

onload = onload_invoke