//GLOBALS
var w3c = (document.getElementById) ? 1:0
var ns4 = (document.layers) ? 1:0  //browser detect for NS4 & W3C standards



function visual(aa) {
if (document.getElementById){

    if(document.getElementById(aa).style.visibility=='hidden'){
        document.getElementById(aa).style.visibility='visible';
    }else{
        document.getElementById(aa).style.visibility='hidden';
    }
}
}