列表框问题（急）

1<select name="one"></select>

1<select name="two"></select>

1<select name="three"></select>

1<select name="four"></select>

1<input name="result"/>

 1<script>   
 2var arrSel=["one","two","three","four"];//arrSel定义了要修改的下拉框   
 3var i=0,arrData=[];//arrData中搁的是数据,每条都显示各级的数据   
 4arrData[i++]=["2000","4","14","一点"]   
 5arrData[i++]=["2000","4","14","二点"]   
 6arrData[i++]=["2000","4","18","三点"]   
 7arrData[i++]=["2000","7","14","二点"]   
 8arrData[i++]=["2001","6","15","二点"]   
 9arrData[i++]=["2001","6","23","七点"]   
10arrData[i++]=["2001","8","18","二点"]   
11arrData[i++]=["2002","7","1","二点"]   
12arrData[i++]=["2002","7","1","三点"]   
13arrData[i++]=["2002","7","11","二点"]   
14arrData[i++]=["2002","7","19","二点"]   
15</script>

 1<script>   
 2function qswhInit(num){   
 3/******* by qiushuiwuhen(2002-5-15) ********/   
 4var i,j,arrTemp=[];   
 5for(i=0;i<num;i++)arrTemp[i]=document.all(arrSel[i]).options[document.all(arrSel[i]).selectedIndex].text   
 6if(num==arrSel.length){//这里处理最后的数据。   
 7document.all("result").value="选中了("+arrTemp[0]+","+arrTemp[1]+","+arrTemp[2]+","+arrTemp[3]+")";return;   
 8}   
 9with(document.all(arrSel[num])){   
10length=0   
11for(i=0;i<arrData.length;i++){   
12for(j=0;j<num;j++)if(arrTemp[j]!=arrData[i][j])break;   
13if(j!=num)continue;   
14if(length==0 ¦ &brvbaroptions[length-1].text!=arrData[i][num])   
15options[length++].text=arrData[i][num];   
16}   
17onchange=new Function("qswhInit("+(num+1)+")");   
18onchange();   
19}   
20}   
21qswhInit(0);//初始化   
22</script>