var navOpen;

function slideNav(e) {
	if ( navOpen && this.id == navOpen )
		return;
	
	if ( navOpen ) {
		var animOld = new YAHOO.util.Anim( $(navOpen), { height : { to : 0 } }, 0.5, YAHOO.util.Easing.easeOut );
		animOld.animate();
	}
	
	var anim = new YAHOO.util.Anim( this, null, 0.5, YAHOO.util.Easing.easeOut );
	anim.attributes.height = { to: this.scrollHeight };
	anim.animate();
	
	navOpen = this.id;
}

YAHOO.util.Event.addListener( window, "load", function() {
	YAHOO.util.Event.addListener( "navProductLink", "click", slideNav, $("navProduct"), true );
	YAHOO.util.Event.addListener( "navBrandLink", "click", slideNav, $("navBrand"), true );
	YAHOO.util.Event.addListener( "navPriceLink", "click", slideNav, $("navPrice"), true );
});