Validation Issue

Hi,

I have one scenario for handling validation based on Checkbox click i need to hide the div.
if click the Radio ALL then hide the DIV "'chckcategory'".
and also if Click the CurrentTime then hide the DIV 'chckTime'.
I have following code.
<input type='radio' value='ALL' id='rdbtn1' onClick="return validate('ctl_Chekcategory')";/>
<input type='radio' value='select'>
<div id='chckcategory'>
<input type='checkbox' id='chkbx1'/>
<input type='checkbox' id='chkbx1'/>
<input type='checkbox' id='chkbx1'/>
</div>
 
<input type='radio' value='CurrentTime' id='rdbtn1' onClick="return validate('ctl_chckTime)";/>
<input type='radio' value='select'>
<div id='chckTime'>
<input type='TextBox' id='txbx'/>
</div>
 
Ja ...