<!Doctype html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=GBK"> <script src="https://www.jb51.net/jquery-1.6.2.min.js" type="text/javascript"></script> <style type="text/css"> body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,form,img,dl,dt,dd,table,th,td,blockquote,fieldset,div,strong,label,em {margin:0;padding:0;border:0;} ul,ol,li{list-style:none;} input,button{margin:0;font-size:12px;vertical-align:middle;} body{font-size:12px;font-family:Arial, Helvetica, sans-serif; text-align:center; margin:0 auto; background:url (../images/BG.jpg) repeat-y;} table{border-collapse:collapse;border-spacing:0;} .box{ padding:9px 0 0 11px; width:759px; height:611px; background:#ccc; margin:20px auto; } .inbox{ width:751px; height:596px;position:relative;} #random_box li{ position:absolute; width:144px; overflow:hidden; height:144px; border:3px solid #c7c5ca; background:#fff;} #random_box li img{ width:144px; display:block; height:144px;} .ok{ display:block; width:442px; height:294px; background:#c00; color:#fff; font-size:48px; position:absolute; top:149px; left:148px; cursor:pointer; text-align:center; line-height:280px;} #random_1{ left:0; top:0;} #random_2{ left:148px;top:0;} #random_3{ left:296px;top:0;} #random_4{ left:444px;top:0;} #random_5{ left:592px;top:0; } #random_6{ left:592px;top:148px;} #random_7{ left:592px; top:298px;} #random_8{ left:592px; top:446px;} #random_9{ left:444px; top:446px;} #random_10{ left:296px; top:446px;} #random_11{ left:148px; top:446px;} #random_12{ left:0; top:446px;} #random_13{ left:0; top:298px;} #random_14{ left:0; top:148px;} #random_box li.random_current{border:1px solid red;} </style> </head> <body> <div> <div> <ul> <li>1</li> <li>2</li> <li>3</li> <li>4</li> <li>5</li> <li>6</li> <li>7</li> <li>8</li> <li>9</li> <li>10</li> <li>11</li> <li>12</li> <li>13</li> <li>14</li> </ul> <b>抽奖</b> </div> </div> <script> var index=1, //当前亮区位置 prevIndex=14, //前一位置 Speed=300, //初始速度 Time, //定义对象 arr_length = 14; //GetSide(5,5), //初始化数组 EndIndex=1, //决定在哪一格变慢 cycle=0, //转动圈数 EndCycle=3, //计算圈数 flag=false, //结束转动标志 random_num=1, //中奖数 quick=0; //加速 function StartGame(){ $("#random_box li").removeClass("random_current"); //取消选中 //random_num = parseInt($("#txtnum").val());// random_num = Math.floor(Math.random()*13+2); //产出随机中奖数2--12之间 index=1; //再来一次,从1开始 cycle=0; flag=false; //EndIndex=Math.floor(Math.random()*12); if(random_num>5) { EndIndex = random_num - 5; //前5格开始变慢 } else { EndIndex = random_num + 14 - 5; //前5格开始变慢 } //EndCycle=Math.floor(Math.random()*3); Time = setInterval(Star,Speed); } function Star(num){ //跑马灯变速 if(flag==false){ //走五格开始加速 if(quick==5){ clearInterval(Time); Speed=50; Time=setInterval(Star,Speed); } //跑N圈减速 if(cycle==EndCycle+1 && index-1==EndIndex){ clearInterval(Time); Speed=300; flag=true; //触发结束 Time=setInterval(Star,Speed); } } if(index>arr_length){ index=1; cycle++; } //结束转动并选中号码 if(flag==true && index==parseInt(random_num)){ quick=0; clearInterval(Time); } $("#random_"+index).addClass('random_current'); //设置当前选中样式 if(index>1) prevIndex=index-1; else{ prevIndex=arr_length; } $("#random_"+prevIndex).removeClass('random_current'); //取消上次选择样式 index++; quick++; } </script> </body> </html>
jQuery实现转动随机数抽奖效果的方法
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