可以试试如下。。如果别的地方再有checkbox就不好用了。。<script language="javascript">
function ifSelect(fmName)
{
var count=0;
for (i=0;i<fmName.elements.length;i++)
{
if (fmName.elements[i].type=='checkbox')
{
if (fmName.elements[i].checked == true)
{
count=count+1;
} }
}
if(count>0)
                  {
                    play();
                   }
                   else
                   {
                    nolist()
                   }

</script>