function random(){
var ramimage = new Array("/common/images/btm4_key1.jpg","/common/images/btm4_key1.jpg");
var dd = new Date();
var sec = dd.getSeconds()
var curimg = ramimage[sec % ramimage.length];
document.write("<img src=\"" + curimg + "\" alt=\"就職活動支援システム（在学生専用）\" WIDTH=\"754\" HEIGHT=\"123\" />");
}
random();