Javascript称球
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
??? <title>無標題頁</title>
</head>
<body>
??? <form id="form1" runat="server">
??? <div>
??? 一道經典的智力題（12球稱三次找出異常一球）
??? 有十二個乒乓球特征相同，其中只有一個重量異常，現在要求用一部沒有砝碼的天平稱三次，將那個重量異常的球找出來。
評分標準：
1、30分鐘以內做出來：智力很高很高很高，不知道有多高。
2、60分鐘以內做出來：智力很高。
3、兩小時內做出來： 智力相當高。
4、1天或者1周內做出來：智力也很高，而且還是一個有毅力的人。
5、10分鐘內做出來：你或者以前做過，或者多半是個馬虎的人。
這里的問題關鍵是異常，所以不知道是輕了，還是重了，并且解題最后還要知道這球是輕還是重了。
??? </div>
??? <div>
???? <select name=one></select>
<select name=two></select>
<select name=three></select>
<select name=four></select>
<script>
var arrSel=["one","two","three","four"];//arrSel定義了要修改的下拉框
var i=0,arrData=[];//arrData中擱的是數據,每條都顯示各級的數據
arrData[i++]=["(1,2,3,4)比(5,6,7,8)","請先做前面的選擇","請先做前面的選擇","請先做前面的選擇"]
arrData[i++]=["重","(1,2,5)比(3,6,9)","請先做前面的選擇","請先做前面的選擇"]
arrData[i++]=["重","重","(1)比(2)","請先做前面的選擇"]
arrData[i++]=["重","重","重","1球比較重"]
arrData[i++]=["重","重","平","6球比較輕"]
arrData[i++]=["重","重","輕","2球比較重"]
arrData[i++]=["重","平","(7)比(8)","請先做前面的選擇"]
arrData[i++]=["重","平","重","8球比較輕"]
arrData[i++]=["重","平","平","4球比較重"]
arrData[i++]=["重","平","輕","7球比較輕"]
arrData[i++]=["重","輕","(1)比(3)","請先做前面的選擇"]
arrData[i++]=["重","輕","重","無解"]
arrData[i++]=["重","輕","平","5球比較輕"]
arrData[i++]=["重","輕","輕","3球比較重"]
arrData[i++]=["平","(9,10)比(1,11)","請先做前面的選擇","請先做前面的選擇"]
arrData[i++]=["平","重","(9)比(11)","請先做前面的選擇"]
arrData[i++]=["平","重","重","9球比較重"]
arrData[i++]=["平","重","平","11球比較輕"]
arrData[i++]=["平","重","輕","10球比較重"]
arrData[i++]=["平","平","(1)比(12)","請先做前面的選擇"]
arrData[i++]=["平","平","重","12球比較輕"]
arrData[i++]=["平","平","平","無解"]
arrData[i++]=["平","平","輕","12球比較重"]
arrData[i++]=["平","輕","(9)比(10)","請先做前面的選擇"]
arrData[i++]=["平","輕","重","9球比較輕"]
arrData[i++]=["平","輕","平","11球比較重"]
arrData[i++]=["平","輕","輕","10球比較輕"]
arrData[i++]=["輕","(1,2,5)比(3,6,9)","請先做前面的選擇","請先做前面的選擇"]
arrData[i++]=["輕","重","(1)比(3)","請先做前面的選擇"]
arrData[i++]=["輕","重","重","3球比較輕"]
arrData[i++]=["輕","重","平","5球比較重"]
arrData[i++]=["輕","重","輕","無解"]
arrData[i++]=["輕","平","(7)比(8)","請先做前面的選擇"]
arrData[i++]=["輕","平","重","7球比較重"]
arrData[i++]=["輕","平","平","4球比較輕"]
arrData[i++]=["輕","平","輕","8球比較重"]
arrData[i++]=["輕","輕","(1)比(2)","請先做前面的選擇"]
arrData[i++]=["輕","輕","重","2球比較輕"]
arrData[i++]=["輕","輕","平","6球比較重"]
arrData[i++]=["輕","輕","輕","1球比較輕"]
</script>
<script>
function qswhInit(num){
/******* by qiushuiwuhen(2002-5-15) ********/
?var i,j,arrTemp=[];
?for(i=0;i<num;i++)arrTemp[i]=document.all(arrSel[i]).options[document.all(arrSel[i]).selectedIndex].text
?if(num==arrSel.length){//這里處理最后的數據。
??return;
?}
?with(document.all(arrSel[num])){
??length=0
??for(i=0;i<arrData.length;i++){??
???for(j=0;j<num;j++)if(arrTemp[j]!=arrData[i][j])break;
???if(j!=num)continue;
???if(length==0||options[length-1].text!=arrData[i][num])
???options[length++].text=arrData[i][num];
??}
??οnchange=new Function("qswhInit("+(num+1)+")");
??onchange();
?}
}
qswhInit(0);//初始化
</script>
??? </div>
??? </form>
</body>
</html>
轉載于:https://www.cnblogs.com/lhking/archive/2009/01/09/1372500.html
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