function ToggleSubCatVisibility(categoryid){
	var ElementToToggle = document.getElementById("subcat_" + categoryid);
	var PlusMinusIcon = document.getElementById("plusicon_" + categoryid);
	
	if(ElementToToggle.className == "hidden"){
		ElementToToggle.className = "";
		PlusMinusIcon.src = "images/icon_minus.gif"
	}else{
		ElementToToggle.className = "hidden";
		PlusMinusIcon.src = "images/icon_plus.gif"
	}

	return false;
}