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

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

function ChangePic(imgName, imgAlt, imglink) {
	if (ns3up || ie4up) {
	var imglinkstart = "<font face=tahoma size=1><a href=\"viewpicture.php?id=";
	var imglinkend   = "\"><img src=images/zoom+.png border=0 align=absmiddle>Zoom image</a></font>";
		imgOn = ("" + imgName);
		document.mainpic.src = imgOn;
		document.mainpic.alt = imgAlt;
		document.getElementById("zoompic").innerHTML = (imglinkstart + imglink + imglinkend);

	
	if (document.form1 != null){
		var photo_text = document.form1.photoid;
		if ( photo_text != null ){
			photo_text.innerText = imglink;
			photo_text.value = imglink;
		}
	}


   }
}