function arrFind(inputname){
var arr = document.getElementsByName(inputname);
var arr_check = [];
for(var i=0; i<arr.length; i++){
if(arr[i].checked) arr_check.push(arr[i].value);
}
return arr_check;
}
var arr = document.getElementsByName(inputname);
var arr_check = [];
for(var i=0; i<arr.length; i++){
if(arr[i].checked) arr_check.push(arr[i].value);
}
return arr_check;
}
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title> new document </title>
<meta name="generator" content="editplus" />
<meta name="author" content="" />
<meta name="keywords" content="" />
<meta name="description" content="" />
</head> <body>
<input type=checkbox name="fu[]" value=333 />333<br />
<input type=checkbox name="fu[]" value=444 checked />444
<script type="text/javascript">
<!--
function arrFind(inputname){
var arr_check = document.getElementsByName(inputname);
for (var i=0; i<arr_check.length; i++)
{
if (arr_check[i].checked)
{
return arr_check[i].value;
}
}
}
alert(arrFind("fu[]"));
//-->
</script>
</body>
</html>