function rotateLogo()
{
	var elt = document.getElementById("logo");
	if(!elt) 
		return;
	
	var date = new Date();
	var idx = (date.getSeconds() % 7) + 1;
	var idxStr = "0";
	
	if(idx < 10)
		idxStr += idx;
	else
		idxStr = "" + idx;
	
	var url = "layout/logo/logo." + idxStr + ".gif";
	
	elt.style.backgroundImage = "url(" + url + ")"; 
}

function hookEvent(id, event, handler)
{
	var elt = document.getElementById(id);
	if(!elt)
		return false;
		
	eval("elt." + event + " = handler");
	return true;
}

function initGlobal()
{
	rotateLogo();
}

window.onload = initGlobal;