img=new Array (
	"img/banner/banner160x370_01.gif",
	"img/banner/banner160x370_02.gif",
	"img/banner/banner160x370_03.gif"
);

url=new Array (
	"www.apart.hk/creator/signup",
	"www.hkas.edu.hk/3programmes/summercourse.pdf",
	"www.apart.hk/creator/signup"
);

banner=Math.floor(img.length*Math.random());
banner='<a href="http://'+url[banner]+'"target="_blank"><img src="../'+ img[banner]+ '" width="160" height="370" "class="banner"></a>';