本文實例講述了jQuery實現轉動隨機數抽獎效果的方法。分享給大家供大家參考。具體實現方法如下：
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 <!Doctype html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=GBK"> <script src="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 class="box"> <div class="inbox"> <ul id="random_box"> <li id="random_1">1</li> <li id="random_2">2</li> <li id="random_3">3</li> <li id="random_4">4</li> <li id="random_5">5</li> <li id="random_6">6</li> <li id="random_7">7</li> <li id="random_8">8</li> <li id="random_9">9</li> <li id="random_10">10</li> <li id="random_11">11</li> <li id="random_12">12</li> <li id="random_13">13</li> <li id="random_14">14</li> </ul> <b class="ok" onClick="StartGame()">抽獎</b> </div> </div> <script> var index=1, //當前亮區位置 prevIndex=14, //前一位置 Speed=300, //初始速度 Time, //定義對象 arr_length = 14; //GetSide(5,5), //初始化數組 EndIndex=1, //決定在哪一格變慢 cycle=0, //轉動圈數 EndCycle=3, //計算圈數 flag=false, //結束轉動標志 random_num=1, //中獎數 quick=0; //加速 function StartGame(){ $("#random_box li").removeClass("random_current"); //取消選中 //random_num = parseInt($("#txtnum").val());// random_num = Math.floor(Math.random()*13+2); //產出隨機中獎數2--12之間 index=1; //再來一次,從1開始 cycle=0; flag=false; //EndIndex=Math.floor(Math.random()*12); if(random_num>5) { EndIndex = random_num - 5; //前5格開始變慢 } else { EndIndex = random_num + 14 - 5; //前5格開始變慢 } //EndCycle=Math.floor(Math.random()*3); Time = setInterval(Star,Speed); } function Star(num){ //跑馬燈變速 if(flag==false){ //走五格開始加速 if(quick==5){ clearInterval(Time); Speed=50; Time=setInterval(Star,Speed); } //跑N圈減速 if(cycle==EndCycle+1 && index-1==EndIndex){ clearInterval(Time); Speed=300; flag=true; //觸發結束 Time=setInterval(Star,Speed); } } if(index>arr_length){ index=1; cycle++; } //結束轉動並選中號碼 if(flag==true && index==parseInt(random_num)){ quick=0; clearInterval(Time); } $("#random_"+index).addClass('random_current'); //設置當前選中樣式 if(index>1) prevIndex=index-1; else{ prevIndex=arr_length; } $("#random_"+prevIndex).removeClass('random_current'); //取消上次選擇樣式 index++; quick++; } </script> </body> </html>希望本文所述對大家的jQuery程序設計有所幫助。