var bv = navigator.appVersion.charAt(0);
var bn = navigator.appName.substr(0,2);
var IE = false;
var NN = false;
var flg = true;
if      ((bv >= 4)&&(bn == "Mi")){IE = true;}
else if ((bv >= 5)&&(bn == "Ne")){NN = true;}
else if ((bv >= 6)&&(bn == "Op")){IE = true;}

function pop_in(){
	if(IE){obj = document.all.item("pop");}
	if(NN){obj = document.getElementById("pop");}
	if(flg){
		obj.style.visibility = "visible";
		flg = false;
	}else{
		obj.style.visibility = "hidden"; 
		flg = true;
	}
}