function image_show(obj, id) {
	if (document.getElementById) {
		var image = document.getElementById(id);
		image.style.left = image_getpos(obj, 'left')+'px';
		image.style.top = image_getpos(obj, 'top')+'px';
		image.style.display = "block";
	}
}

function image_hide(id) {
	document.getElementById(id).style.display = "none";
}

function image_getpos(obj, offsettype) {
	var totaloffset = (offsettype == "left") ? obj.offsetLeft - 75 : obj.offsetTop + 1;
	var parentEl = obj.offsetParent;
	while (parentEl != null) {
		totaloffset = (offsettype == "left") ? totaloffset+parentEl.offsetLeft : totaloffset+parentEl.offsetTop;
		parentEl = parentEl.offsetParent;
	}
	return totaloffset;
}

function init_navigation_rollovers() {
	$$(".head-menu-tab").each( function(objThis) {
		objThis.onmouseover = aTab_onmouseover;
		objThis.onmouseout = aTab_onmouseout;
	});
}

function aTab_onmouseover() {
	new Effect.Morph(this, {"style": "padding-top: 5px;", "duration": 0.11});
	this.style.backgroundImage = this.style.backgroundImage.replace("_normal", "_hover");
}

function aTab_onmouseout() {
	new Effect.Morph(this, {"style": "padding-top: 0px;", "duration": 0.09, "queue": "end"});
	this.style.backgroundImage = this.style.backgroundImage.replace("_hover", "_normal");
}