JavaScript Checkboxes colorize

Checkboxes colorize

<SCRIPT>
var msgs_num=1;
function check(num,check) { var chbox=document.all("box"+num); if (check) chbox.style.backgroundColor="silver"; else chbox.style.backgroundColor=""; }
</SCRIPT>

<TABLE cellSpacing=0 cellPadding=0 width="100%">
<TR bgcolor=#e1e1e1 class=wList1 id=box1>
<TD><INPUT onclick=check(1,this.checked) type=checkbox value=3756007 name=m[23]></TD>
<TD>dasdsa</TD>
<TD>26K</TD></TR>
</TABLE>