function swapFocus(what,where,how) {
	if(where==null)
		where=what;
	if(document.getElementById)
		document.getElementById(where).src="rev4_files/"+what+how+".gif";
	else if(document.images)
		document [where].src="rev4_files/"+what+how+".gif";
	where=null;
}
function setFocus(what,where) {
	swapFocus(what,where,'-pressed');
}
function clearFocus(what,where) {
	swapFocus(what,where,'');
}
function replaceFirefoxLink(linkID) {
if(document.getElementById) {
	var linkNode=document.getElementById(linkID);
	if(linkNode) {
		var newLink=document.createElement('a');
		var newImg=document.createElement('img');
		var change=0;
		if ( 0 <= navigator.userAgent.indexOf('Flock/') ) {
		} else if ( 0 <= navigator.userAgent.indexOf('Firefox/0') || 
			0 <= navigator.userAgent.indexOf('Firefox/1') ) {
			change=1;
			newLink.setAttribute('href','http://www.spreadfirefox.com/?q=affiliates&id=880&t=215');
			newImg.setAttribute('alt','Upgrade to Firefox 2!');
			newImg.setAttribute('title','Upgrade to Firefox 2!');
			newImg.setAttribute('src','http://sfx-images.mozilla.org/affiliates/Buttons/firefox2/firefox-spread-btn-4.png');
		} else if (0 <= navigator.userAgent.indexOf('Firefox')) {
			change=1;
			newLink.setAttribute('href','http://www.spreadfirefox.com/?q=user/register&r=880');
			newImg.setAttribute('alt','Spread Firefox!');
			newImg.setAttribute('title','Spread Firefox!');
			newImg.setAttribute('src','../images/SFxButton88x31.png');
		}
		if(change) {
			newLink.appendChild(newImg);
			newImg.setAttribute('border','0');
			newImg.setAttribute('class','button');
			var parentNode=linkNode.parentNode;
			parentNode.replaceChild(newLink,linkNode);
		}
	}
}
}