function initCat(menuID) {
	var mid = document.getElementById(menuID);
	var arr = mid.getElementsByTagName("div");
	for (var i=0;i<arr.length;i++) {
		if ((arr[i].className=="submenu")) arr[i].style.display = "none";
	}
}
function openCat(cat_id) {
	this.className = (this.className == "item") ? "item_chosen" : "item";
	var idcat = document.getElementById(cat_id);
	idcat.style.display = (idcat.style.display == "none") ? "block" : "none";
}

function getelementbyid(myid) {
   if (isNS4){
        objElement = document.layers[myid];
     }else if (isIE4) {
        objElement = document.all[myid];
     }else if (isIE5 || isNS6) {
             objElement = document.getElementById(myid);
     }
return(objElement);
}