var image_names = ['banner1.gif'] ;
var link_addr = ['http://www.saze80.com/'] ;
var r = Math.floor(Math.random() *1);
document.write('<a target=_blank href="' +  link_addr[r] + '">' +  '<img width="560" height="86" border="0" src="http://icivil.ir/' + image_names[r] + '">') ;