解密效果_JavaScript

var data = "01234567";
var done = 1;
function textboxin(text) {
decrypt(text, 2, 1);
}

function textboxout() {
self.text.value = '';
done = 1;
}

function decrypt(text, max, delay) //max=2 delay=1
{
if (done) {
done = 0;
decrypt_helper(text, max, delay, 0, max);
}
}
function decrypt_helper(text, runs_left, delay, charvar, max) //处理解密效果
{
if (!done) {
runs_left = runs_left - 1; //
var box_text = text.substring(0, charvar);
for (var current_char = charvar; current_char < text.length; current_char++) {
box_text += data.charAt(Math.round(Math.random()*data.length)); //利用math对象的随机函数产生"密码"数字串
}
window.text.value = box_text;
//显示超链接的说明内容
var rerun = "decrypt_helper('" + text + "'," + runs_left + "," + delay + "," + charvar + "," + max + ");"
var new_char = charvar + 1;
var next_char = "decrypt_helper('" + text + "'," + max + "," + delay + "," + new_char + "," + max + ");"
if(runs_left > 0)
{
setTimeout(rerun, delay);
}
else {
if (charvar < text.length) {
setTimeout(next_char, Math.round(delay*(charvar+3)/(charvar+1))); //设置"密码"和超链接说明内容的转换时间
}
else {
done = 1;
}
}
}
}