function ventanaSecundaria (URL){ 
   window.open(URL,"ventana1","width=366,height=300,scrollbars=yes") 
}
function popupreenviopwd (URL){ 
   window.open(URL,"ventana1","width=366,height=230,top=100,left=240,scrollbars=yes") 
}
function ventanaSecundariaz (URL){ 
   ventanaz=window.open(URL,"ventana1","width=520,height=380,scrollbars=yes") 
   ventanaz.focus();
}
function ventanaSecundariaz1 (URL){ 
   ventanaz=window.open(URL,"ventana1","width=650,height=450,scrollbars=yes") 
   ventanaz.focus();
}

        var ie4 = (document.all) ? true : false;
        var ns4 = (document.layers) ? true : false;
        var ns6 = (document.getElementById && !document.layers) ? true : false;
        var msie = (navigator.appVersion.indexOf("MSIE") && ! ie4) ? true: false;

        if (ns4) {ns6=false;msie=false; }
        if (ns6 || msie) { ns4=false;ie4=false;}
 
function hidelayer(lay)
{
        if (ie4) {document.all[lay].style.visibility = "hidden";}
        if (ns4) {document.layers[lay].visibility = "hide";}
        if (ns6 || msie) {document.getElementById([lay]).style.display = "none";}
		return true;
}

function showlayer(lay) {
		if (ie4) {		document.all[lay].style.visibility = "visible";		}
        if (ns4) { 		document.layers[lay].visibility = "show"; 	          	}
        if (ns6 || msie) {	document.getElementById([lay]).style.display = "block"; }
		return true;
}