DIV CSS 佈局教程網

function randomChar(l) {
var x = "0123456789qwertyuioplkjhgfdsazxcvbnm";
var tmp = "";
var timestamp = new Date().getTime();
for (var i = 0; i < l; i++) {
tmp += x.charAt(Math.ceil(Math.random() * 100000000) % x.length);
}
return timestamp + tmp;
}