简单实现原理上抽奖，丰富的功能可在此基础上不断完善，
用到的文件：
index.html index.css index.js employee.js jquery.js
依次列出各个文件：
index.html:[html]
<!DOCTYPE html>
<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<link rel="stylesheet" type="text/css" href="index.css" />
</head>
<body>
<div id="container">
<div id=’awardsShow’>
<ul></ul>
</div>
</div>
</body>
</html>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="employee.js"></script>
<script type="text/javascript" src="index.js"></script>[/html]
index.css:[css]
/*
Document : index
Created on : 2013-1-6, 15:08:07
Author : ThinkPad
Description:
Purpose of the stylesheet follows.
*/
root {
display: block;
}
body {
background: url(‘nh.jpg’) repeat;
}
ul {
list-style: none;
}
#awardsShow {
text-align: center;
}[/css]
index.js[js]
var take;
var awards;
var number = 0;
$(document).ready(function(){
awards = new Array(‘三等奖|30|5|微波炉一台’,’二等奖|20|5|冰箱一台’,’一等奖|10|5|iphone一台’);
//计算一共要抽奖几次
for(i = 0;i < awards.length; i++){
var amount = awards[i].split(‘|’)[1]/awards[i].split(‘|’)[2];
number += amount;
}
for(var i = 0; i < awards.length; i++){
var award = awards[i].split(‘|’);
var str = ‘<li>’+award[0]+award[1]+’名’+award[3]+'</li>’;
$(‘#awardsShow ul’).append(str);
}
take = new lottery();
//绑定回车事件
$(document).keypress(function(e){
if(e.which == 13){
take.handle();
}
});
});
//将数组打乱
function shuffle(arr) {
var i = arr.length;
var ii = Math.floor(Math.random()*i);
var len = arr.length;
var ii = Math.floor(Math.random()*len);
for(var i = 0; i < len; i++){
var tmp = arr[i];
arr[i] = arr[ii];
arr[ii] = tmp;
}
return arr;
}
function arraySlice(arr,start,count){
arr = employee;
start = Math.floor(Math.random()*employee.length);
count = 5;
console.info(start,count)
var part;
part = arr.slice(start,start+count);
console.info(part);
if(start+count>arr.length){
console.info((start+count)-(arr.length));
part = part.concat(arr.slice(0,(start+count)-(arr.length)));
}
console.info(part);
return part.join(‘ ‘);
}
//抽奖主程序
function game(){
//如果单击回车时stop为真，则表示要停下来
if(take.stop){
console.log(‘停止’);
return false;
}else{
console.log(‘不通知’);
var employeePart = shuffle(employee);
var start = Math.floor(Math.random()*(employeePart.length));
var result = arraySlice(employeePart,start,awards[0].split(‘|’)[2]);
$(‘#awardsShow ul’).html(result);
setTimeout(game,100);
}
}
function circle(){
var employeePart = shuffle(employee);
var start = Math.floor(Math.random()*(employeePart.length+1));
var result = arraySlice(employeePart,start,awards[0].split(‘|’)[2]);
$(‘#awardsShow ul’).html(result);
}
var lottery = function(){
//决定是抽奖开始停下
this.stop = false;
this.action = ‘begin’;
this.init = function(){
this.step = 0;
this.stop = false;
};
this.handle = function(){
switch(this.action){
case ‘begin’:
this.action = ‘stop’;
this.stop = false;
game();
break;
case ‘stop’:
this.action = ‘begin’;
this.stop = true;
break;
}
};
};[/js]
employee.js[js]
var employee = new Array(
‘hava’, ‘hellogxp’, ‘Davaid’, ‘Lili’,’Gavin’, ‘defrgt’,’kooke’,’fkfrjr’
);[/js]
