var toggle = 'default';

function getObById(id)
{
	if (document.layers) //Netscape 4
		return eval('document.' + id);
	else if (navigator.userAgent.indexOf("Opera") != -1) //Opera
		return eval("document.all."+id);
	else // all others . . .
		return document.getElementById(id);
}


function enlarge(imagename)
{
	getObById(toggle).className = 'hide';
	toggle = imagename;
	getObById(imagename).className = 'show';
}