var kazu = 4 ;
var kazu2 = Math.random() ;
var ransu = Math.round( (kazu-1) * kazu2) + 1 ;

links = new Array
links[1] = "<a href=\"../kuji/kuji.html?TB_iframe=true&height=330&width=250\" rel=\"sexylightbox\" title=\"LOVEおみくじ\"><img src=\"../commons/images/ban_omikuji.png\" alt=\"LOVEおみくじ\" class=\"RollEasy\" /></a>"
links[2] = "<a href=\"../kuji/kuji2.html?TB_iframe=true&height=330&width=250\" rel=\"sexylightbox\" title=\"LOVEおみくじ\"><img src=\"../commons/images/ban_omikuji.png\" alt=\"LOVEおみくじ\" class=\"RollEasy\" /></a>"
links[3] = "<a href=\"../kuji/kuji3.html?TB_iframe=true&height=330&width=250\" rel=\"sexylightbox\" title=\"LOVEおみくじ\"><img src=\"../commons/images/ban_omikuji.png\" alt=\"LOVEおみくじ\" class=\"RollEasy\" /></a>"
links[4] = "<a href=\"../kuji/kuji4.html?TB_iframe=true&height=330&width=250\" rel=\"sexylightbox\" title=\"LOVEおみくじ\"><img src=\"../commons/images/ban_omikuji.png\" alt=\"LOVEおみくじ\" class=\"RollEasy\" /></a>"
var bun = links[ransu]

document.write(bun);