JavaScriipt实用并且简单的抽奖程序

来源：互联网发布：java工程师培训资格证编辑：程序博客网时间：2024/06/06 09:55

1.需求说明

某公司年终抽奖，需要有如下功能

1）可以根据实际情况设置到场人数的最大值

2）点击“开始”，大屏幕滚动，点击“停止”，获奖者的编号出现在大屏幕上

3）在界面里显示全部奖项获奖人编号

4）不重复获奖

5）不会因为输入错误而导致抽奖结果异常。

2.代码呈上

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 TRANSITIONAL//EN"><html><head><title>某公司周年庆抽奖</title><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><script language="javascript">var timer;var flag = new Array(100);var existingnum = new Array(100);var clickTimes = 0;var randnum;var cellnum =1;var mobile;var num ;function check_input(){  var input = document.getElementById("real_num").value;    var re = /^[1-9]+[0-9]*]*$/;    if (!re.test(input)){          alert("请输入正整数");          window.location.href=window.location.href;         return false;       }}  //get the random numbers from the mobile array every 0.05sfunction setTimer(){timer = setInterval("getRandNum();",50);    document.getElementById("start").disabled = true;    document.getElementById("end").disabled = false;}function getRandNum(){document.getElementById("result").value = mobile[GetRnd(0,num)];}function GetRnd(min,max){ randnum = parseInt(Math.random()*(max-min+1));return randnum;}//------------------------------------------------//turn the input's running downfunction clearTimer(){    noDupNum();clearInterval(timer);    document.getElementById("start").disabled = false;    document.getElementById("end").disabled = true;}// Re defined array:change the length of the array and delete the checked onefunction noDupNum(){    mobile.removeEleAt(randnum);    var o = 0;    for(p=0; p<mobile.length;p++){    if(typeof mobile[p]!="undefined"){    mobile[o] = mobile[p]; o++;    }    }num = mobile.length-1; } function setValues(){ document.getElementById(cellnum).value = document.getElementById("result").value ;    cellnum++; } function set_array(){ var real_num = document.getElementById("real_num").value ; mobile= new Array(real_num); var o = 0; for(i=1; i<=real_num;i++){    mobile[o] = i;    o++;    }num = mobile.length-1;document.getElementById("set_number").disabled = true; }Array.prototype.removeEleAt = function(dx){    if(isNaN(dx)||dx>this.length){return false;}   this.splice(dx,1);    }</script></head><body><center><div id="main"> <div><h1>获奖小伙伴</h1> <p> <input id="result" type="text" size="30" style="height:130px;width:800px;border:2px solid red;font-size:120;" readonly/> </p> <p> <input id="start" type="button" value="开始" style="border: 1px solid; border-color: #aaa 000 #000 #aaa;width:4em; background: #fc0;" onclick="setTimer()" /> <input id="end" type="button" value="停" style="border: 1px solid; border-color: #aaa 000 #000 #aaa;width:4em; background: #fc0;"onclick="clearTimer();setValues();" disabled/></p> <p><strong>一等奖（1名）</strong></p><table width="190" height="30" border="1"> <tr> <td><input name="text1" type="text" id="3" style="height:30px;width:190px;border:1px solid red;font-size:25;" size="28" readonly/></td> </tr> </table> <p>二等奖（2名）</p> <table width="380" height="30" border="1"> <tr><td><input name="text2" type="text" id="2" style="height:30px;width:190px;border:1px solid red;font-size:25;" size="28" readonly/></td> <td><input name="text3" type="text" id="1" style="height:30px;width:190px;border:1px solid red;font-size:25;" size="20" readonly/></td> </tr> </table> </div></div><p></p><p></p><div id="setter" style="border:1px solid;width:45em"><h3>系统设置</h3> <table width="300" height="30" border="1"> <tr><td>活动人数</td><td><input type="text" id="real_num" style="width:11em"></td><td><input id="set_number" type="button" value="设置" style="border: 1px solid; border-color: #aaa 000 #000 #aaa;width:4em; background: #fc0;" onclick="check_input();set_array();"/></td> </tr> <tr> </tr> </table> <br/> <input id="set_number" type="button" value="重新开始抽奖" style="border: 1px solid; border-color: #aaa 000 #000 #aaa;width:45em;height: 3em;background: #fc0;"  onclick="window.location.href=window.location.href;"/> <p></p></div><center></body></html>

3.丑陋截图

我很丑，但是我很温柔~

2 2