var num = 8;
var link1 = new Array();
var link2 = new Array();
link1[0] = ''
link1[1] = ''
link1[2] = ''
link1[3] = ''
link1[4] = ''
link1[5] = ''
link1[6] = ''
link1[7] = ''
link2[0] = ''
link2[1] = ''
link2[2] = ''
link2[3] = ''
link2[4] = ''
link2[5] = ''
link2[6] = ''
link2[7] = ''
var adnum=Math.round(Math.random()*num)-1;
while(adnum<0 || adnum>num) adnum=Math.round(Math.random()*num)-1;
document.write(link1[adnum]+' '+link2[adnum])