var ns4 = (document.layers);
var ie4 = (document.all && !document.getElementById);
var ie5 = (document.all && document.getElementById);
var ns6 = (!document.all && document.getElementById);

if (ie5) { blockSTART = "document.getElementById("; blockEND = ")"; styleS = ".style"; hidden = "hidden"; visible = "visible"; }
if (ns6) { blockSTART = "document.getElementById("; blockEND = ")"; styleS = ".style"; hidden = "hide"; visible = "show"; }
if (ie4) { blockSTART = "document.all["; blockEND = "]"; styleS = ".style"; hidden = "hidden"; visible = "visible"; }
if (ns4) { blockSTART = "document.layers["; blockEND = "]"; styleS = ""; hidden = "hide"; visible = "show"; }