var _td = Math.round(screen.width*0.18);

if (navigator.appName=='Netscape') {
	var oLength = document.styleSheets[0].cssRules.length;
	var _rule = 'table.main tr td {width: ' + _td + 'px;}';
	document.styleSheets[0].insertRule(_rule, oLength);
	oLength++;
	document.styleSheets[0].insertRule("a img.sponsor {max-width: 90%; max-height: 60px;}", oLength);
	}

	if (navigator.appName=='Microsoft Internet Explorer') {
	var _rule = 'width: ' + _td + 'px';
	document.styleSheets[0].addRule('table.main tr td', _rule);
	document.styleSheets[0].addRule('img', _rule);
	var _img =_td * 0.9;
	_rule = 'width: ' + _img + 'px';
	document.styleSheets[0].addRule('a img.sponsor', _rule);
	document.styleSheets[0].addRule('table.inner tr td', _rule);
	var _table =_td * 0.98*2;
	_rule = 'width: ' + _table + 'px';
	document.styleSheets[0].addRule('table.inner', _rule);
}