有几数组表单，js怎么获得数组并动态相加输出到文本框

有几数组表单，js如何获得数组并动态相加输出到文本框
<input   name= "fee1[] "> <input   name= "fee2[] "> 
<input   name= "fee1[] "> <input   name= "fee2[] "> 
<input   name= "fee1[] "> <input   name= "fee2[] "> 
<input   name= "fee "> 
功能是js获得数组相加并动态在fee的文本框输出 
fee.value=fee1[0].value+fee2[0].value+fee1[1].value+fee2[1].value......

------解决方案--------------------
var n=0; 
var a = document.getElementsByName( "fee1[] "); 
for(var i=0; i <a.length; i++) 
{ 
if(!isNaN(a.value)) n += parseFloat(a.value); 
} 
var a = document.getElementsByName( "fee2[] "); 
for(var i=0; i <a.length; i++) 
{ 
if(!isNaN(a.value)) n += parseFloat(a.value); 
} 
document.getElementsByName( "fee ")[0].value = n==0 ? " " : n; 

------解决方案--------------------
<input name= "fee1[] "> <input name= "fee2[] "> 
<input name= "fee1[] "> <input name= "fee2[] "> 
<input name= "fee1[] "> <input name= "fee2[] "> 
<input name= "fee "> 
<input type= "button " value= "累加 " onclick= "sum() "> 
<script> 
function sum() 
{ 
o = document.getElementsByTagName( "INPUT "); 
total = 0; 
for(c=0;c <o.length;c++) 
{ 
if(/^fee[0-9]+[]$/.test(o[c].name)) 
{ 
if(o[c].value!= " ") total+=parseInt(o[c].value); 
} 
} 
document.getElementsByName( "fee ")[0].value = total; 
} 
</script>