dd=document;
NS=(dd.layers)?1:0;
IE=(dd.all)?1:0;
DOM=(dd.getElementById)?1:0;
function showlor(L) { 
	if(NS)
		dd.layers[L].visibility='show'; 
	else if (IE)
		obg=dd.all[L]; 
	else 
		obg=dd.getElementById(L); 
	if(!NS)
        try {
	obg.style.visibility='visible'
        }
        catch( e ) {}
	} 
function hidelor(L) { 
	if(NS)
		dd.layers[L].visibility='hide'; 
	else if (IE)
		obg=dd.all[L]; 
	else 
		obg=dd.getElementById(L); 
	if(!NS)
        try {
		obg.style.visibility='hidden'
        }
        catch( e ) {}
	}