// VERIFICADOR
var dom = document.getElementById ? true:false;
var nn4 = document.layers ? true:false;
var ie4 = document.all ? true:false;

function mostrar(x,a,b,c,d){

		ymay = a;
		xmin = b;
		xmay = c;
		ymin = d;

		subsub = 'subsub'+x;

		if(ie4){
			document.all[subsubAnt].style.visibility="hidden";
			document.all['subsub'+x].style.visibility="visible";
		}
		else if(nn4){
			document.layers[subsubAnt].visibility="hidden";
			document.layers['subsub'+x].visibility="visible";
		}
		else if(dom){
			document.getElementById(subsubAnt).style.visibility="hidden";
			document.getElementById('subsub'+x).style.visibility="visible";
		}

		subsubAnt=subsub;
}