today=new Date();
jran=today.getTime();

function rnd() {

    ia=9301;
    ic=49297;
    im=233280;

    jran = (jran*ia+ic) % im;
    return jran/(im*1.0);
};

function rand(number) {

    return Math.ceil(rnd()*number);
};


for(i=1;i<=1;i++) {
    myNum=(rand(2)); //改成你要随机显示的图片数；
   if(myNum == 1) document.write("<a href='http://shop.lhhart.com/unit.php?cat=16&uni=3428' target='_blank'><img src='http://www.cartoonwin.com/image/logo/20110916_yzhm.gif' border='0'></a><br>");
   if(myNum == 2) document.write("<a href='http://shop.lhhart.com/cate.php?cat=1&&catid=9' target='_blank'><img src='http://www.cartoonwin.com/image/logo/20100810_baohudai.gif' border='0'></a><br>");
 
 //图片路径，可用http://

   else {
document.write();
}

};