ns4 = (document.layers) ? true:false 
ie4 = (document.all) ? true:false 
ng5 = (document.getElementById) ? true:false

function hideInfo() {
if (ng5) document.getElementById('info1').style.visibility = "hidden"
else if (ns4) document.info1.visibility = "hide"
else if (ie4) info1.style.visibility ="hidden"

if (ng5) document.getElementById('info2').style.visibility = "hidden"
else if (ns4) document.info2.visibility = "hide"
else if (ie4) info2.style.visibility ="hidden"

if (ng5) document.getElementById('info3').style.visibility = "hidden"
else if (ns4) document.info3.visibility = "hide"
else if (ie4) info3.style.visibility ="hidden"
}

function showInfo(n) {
hideInfo();
if (ng5) document.getElementById('info' + n).style.visibility = "visible";
else if (ns4) document.layers["info" + n].visibility = "show";
else if (ie4) document.all["info" + n].style.visibility = "visible";
}

function showAllInfo(n) {
if (ng5) document.getElementById('info' + n).style.visibility = "visible";
else if (ns4) document.layers["info" + n].visibility = "show";
else if (ie4) document.all["info" + n].style.visibility = "visible";
}