var id = null;
function menustart(id) {
 document.getElementById(id).style.visibility = "visible";
 if (navigator.appName == 'Microsoft Internet Explorer'){
	 document.getElementById(id).style.top = "30";
 }
}

function menustop(id) {
 document.getElementById(id).style.visibility = "hidden";
}

function hover(par){
 document.getElementById(par).style.backgroundPosition = '0 -30px';
}
function hoverout(par){
 document.getElementById(par).style.backgroundPosition = '0 0';
}


function ShowHideGroup( id ) {
		var div = document.getElementById( 'group_' + id);
		
		div.style.display = ( div.style.display == 'none' ? 'block' : 'none' );
	};