function tr100net(n) {if(document.images){(new Image()).src="gel/"+n;}return true;}
<!--
function image() {};
image = new image();number = 0;
image[number++] = "<img src='http://www.tr100.net/banner/tr100_1.gif' border='0'>"
image[number++] = "<img src='http://www.tr100.net/banner/tr100_2.gif' border='0'>"
increment = Math.floor(Math.random() * number);
document.write(image[increment]);
//-->