function onMainMenuMouseOver()
{
	var ssrc = this.src;
	ssrc = ssrc.replace("N", "H");
	this.src = ssrc;
}

function onMainMenuMouseOut()
{
	var ssrc = this.src;
	ssrc = ssrc.replace("H", "N");
	this.src = ssrc;
}

function enhanceMainMenu()
{
	$("div#mainmenu img").mouseover(onMainMenuMouseOver);
	$("div#mainmenu img").mouseout(onMainMenuMouseOut);
}

$(document).ready(enhanceMainMenu);