dom = (document.getElementById)? true : false;
ie4 = (document.all && !dom)? true : false;

function menuClick(elemId) {
	
	elemId = "m_"+elemId;
	if (dom || ie4) {
    	var currElement = (dom)? document.getElementById(elemId) : document.all[elemId];
        currElement.style.display = (currElement.style.display == 'none')? 'block' : 'none';
        
        return false;
	} else return true;
}