n=-1; 
ie=-1;

if (document.layers) {n=1;ie=0}
else {n=0;ie=1}
max_nodes=4

function showpull(x) {
	if (ie) {	document.getElementById('pull'+x).style.visibility="visible";		}
	if (n)  {	eval("document.pull"+x+".visibility=\"show\";");	}
}

function hideothers(y){
	if (ie){	for (i=0; i < max_nodes; i++){	if ( i != y )	{	document.getElementById('pull'+i).style.visibility="hidden";	}	}	}
	if (n) {	 for (k=0; k < max_nodes; k++){ if ( k != y ){	eval("document.pull"+k+".visibility=\"hide\";");	}	}	} 
}

function hideall(){
	if (ie){	for (i=0; i < max_nodes; i++){	document.getElementById('pull'+i).style.visibility="hidden";		}	}
	if (n){	for (k=0; k < max_nodes; k++){	eval("document.pull"+k+".visibility=\"hide\";");	}		} 
}