javascript获取同name的元素值

<SCRIPT LANGUAGE="JavaScript">
<!--
function CheckSoftCount(elem){
var values = "";
for(var i=0;i<elem.length;i++){
if(elem[i].checked){
alert(elem[i].value);
}
}

}
//-->
</SCRIPT>
<form name="frm1" method="post" action="">
<input type="checkbox" name="Soft_ID" value="0">
<input type="checkbox" name="Soft_ID" value="1">
<input type="checkbox" name="Soft_ID" value="2">
<input type="checkbox" name="Soft_ID" value="3">
<input type="checkbox" name="Soft_ID" value="4">
<input type="button" onClick="CheckSoftCount(this.form.Soft_ID);" value="查看选中项" name="btnViewPro">
</f