var oldobj = new Array();

function toggle(a,index) {
	if(!index) index=1;
	if(oldobj[index]) {
		document.getElementById(oldobj[index]).style.display="none";
	}
	if(window.changeOpac) changeOpac(0,a);
	document.getElementById(a).style.display="block";
	if(window.opacity) opacity(a,0,100,4000);
	oldobj[index]=a;
}