function random(){

url = new Array(4); 
img = new Array(url.length); 

i = Math.floor(Math.random( ) * url.length);

url[0]="http://ck.jp.ap.valuecommerce.com/servlet/referral?sid=2307737&pid=874389432&vc_url=http%3a%2f%2fwww%2elovecosmetic%2ejp%2fcgi%2faf%2faf%2ecgi%3fAF%3dVC%26JUMP%3dcategory%2flovecosme%2findex%2ehtml";
img[0]="image/cosme.jpg";

url[1]="http://ck.jp.ap.valuecommerce.com/servlet/referral?sid=2307737&pid=874389432&vc_url=http%3a%2f%2fwww%2elovecosmetic%2ejp%2fcgi%2faf%2faf%2ecgi%3fAF%3dVC%26JUMP%3dcategory%2fbody%2findex%2ehtml";
img[1]="image/bodycare.jpg";

url[2]="http://ck.jp.ap.valuecommerce.com/servlet/referral?sid=2307737&pid=874389432&vc_url=http%3a%2f%2fwww%2elovecosmetic%2ejp%2fcgi%2faf%2faf%2ecgi%3fAF%3dVC%26JUMP%3dcategory%2fbust%2findex%2ehtml";
img[2]="image/bustup.jpg";

url[3]="http://ck.jp.ap.valuecommerce.com/servlet/referral?sid=2307737&pid=874389432&vc_url=http%3a%2f%2fwww%2elovecosmetic%2ejp%2fcgi%2faf%2faf%2ecgi%3fAF%3dVC%26JUMP%3dcategory%2flovefoods%2findex%2ehtml";
img[3]="image/foods.jpg";




/*これ以降は、3,4,5と数字を増やしてください。*/

document.write('<a href="'+url[i]+'" target="_self">'); 
document.write('<img src="'+img[i]+'" border="0"></a>');

}