Går det med javascript att visa en annan

<script language="JavaScript" type="text/javascript">
function getHTTPStatus(url) {
	if (document.layers && navigator.javaEnabled()){
		if ((location.host == '') || (url.indexOf(location.host) == -1)){ netscape.security.PrivilegeManager.enablePrivilege('UniversalConnect'); }
		var urlObj = new java.net.URL(url); var port = (urlObj.getPort()>0)?urlObj.getPort():80;
		var socket = new java.net.Socket (urlObj.getHost(),port);
		var dos = new java.io.DataOutputStream(socket.getOutputStream());
		dos.writeBytes('HEAD ' + urlObj.getFile() + ' HTTP/1.0\r\n\r\n'); 
		var dis = new java.io.DataInputStream(socket.getInputStream());
		var data = dis.readLine();
		dis.close(); dos.close(); socket.close();
		var re = /(HTTP\/[\d\.]+) (\d\d\d) ?(.*)$/i;
		var match = re.exec(data);
		return match[2];
	} else if (document.getElementById && window.ActiveXObject) {
		var http = new ActiveXObject('Microsoft.XMLHTTP');
		http.open('HEAD', url, false);
		http.send();
		return http.status;
	} else {
		return false;
	}
}
window.onload=function(){
	if(getHTTPStatus(document.images['foo'].src)=='404'){
		document.images['foo'].src='images/bildsomfinns.gif';
	}
}
</script>
<img src="http://www.sunet.se/dennabildfinnsinte.gif" name="foo" width="100" height="100" alt="...">

Något sånt... Scriptet fungerar bäst i IE. Netscape 4.x fungerer näst intill lika bra så när som på en varningsruta. Mozilla har jag inget motsvarande för, än.

En kod till

<img src="http://server/logga.gif1" name="x" onerror="loadOtherImage(this);">
<script language="javascript">
var i = -1;
function loadOtherImage(img)
{
++i;
var imgs =
[
"http://server/logga.gif2",
"http://server/logga3.gif",
"http://server/logga4.gif"
];
img.src=imgs[i];
}
</script>