function myBack(n) { if(navigator.appVersion.charAt(0) <=2 && navigator.appName.charAt(0) == "N") { t = new Date() t = t.getTime(); t += ""; t = t.substring(t.length-3,t.length); t = eval(t)/1000 t = Math.floor(t*n) return t } else { t = Math.floor(Math.random()*n) return t } } var imgMax =5 var backimage = new Array() backimage[0] = "http://www.kuso080.com/picture/nirin1.jpg" backimage[1] = "http://www.kuso080.com/picture/nirin2.jpg" backimage[2] = "http://www.kuso080.com/picture/nirin3.jpg" backimage[3] = "http://www.kuso080.com/picture/nirin4.jpg" backimage[4] = "http://www.kuso080.com/picture/nirin5.jpg" var img = myBack(imgMax); document.write("")