browserName = navigator.appName;
browserVer = parseInt(navigator.appVersion);

ns3up = (browserName == "Netscape" && browserVer >= 3);
ie4up = (browserName.indexOf("Microsoft") >= 0 && browserVer >= 4);

function doPic(imgName) {
if (ns3up || ie4up) {
imgOn = ("" + imgName);
/*document.mainpic.src = imgOn;
*/var contentobj=document.getElementById? document.getElementById("ss_show"): document.all.content_body
contentobj.innerHTML='<center><img src="'+imgOn+'"></center>'
   }
}