hide show checkbox not working in IE

[deepakraikar]

i have done a working code of visiblity of checkboxes depending upon the drop dwon selection...... .it works fine with mozilla but its not working with the internet explorer......

my javascript code....

function showtr(show)
{
      document.getElementById(show).style.display = '';
}
  
function hidetr(hide)
{
      document.getElementById(hide).style.display = 'none';
}

my HTML code...

<td><select name="jumpMenu" id="jumpMenu">
      <option selected="selected">-</option>
	  <option onClick="showtr('one'); showtr('two'); showtr('three'); showtr('four'); hidetr('five');">Goa</option>
      <option onClick="hidetr('one'); hidetr('two'); hidetr('three'); hidetr('four'); showtr('five');">Karnataka</option>
     
    </select>
	</td>

 <td>
	
	
	<table border="0">
     <tr id="one" style="display:none;">
       
        <td>
		<input type="checkbox" name="FieldData3" value="mpanjim" maxlength="100" size="30" id="name1" /></td>
		 <td class="cooltd"><label for="name1">Message To Panjim</label></td>
      </tr>
      <tr id="two" style="display:none;">
        <td><input type="checkbox" name="FieldData5" value="mmargao" maxlength="100" size="30" id="name2" /></td>
		<td class="cooltd"><label for="name2">Message to Margao</label></td>
      </tr>
      <tr id="three" style="display:none;">
     <td><input type="checkbox" name="FieldData7" value="mvasco" maxlength="100" size="30" id="name3" /></td>
	   <td class="cooltd"><label for="name3">Message to Vasco</label></td>
      </tr>
      <tr id="four" style="display:none;">
     <td><input type="checkbox" name="FieldData7" value="mponda" maxlength="100" size="30" id="name3" /></td>
	   <td class="cooltd"><label for="name3">Message to Ponda</label></td>
      </tr>
      <tr id="five" style="display:none;">
     	<td>
     	<input type="checkbox" name="FieldData11" value="mhubli" maxlength="100" size="30" id="name5" />
        </td>
	    <td class="cooltd"><label for="name5">Message To Hubli</label></td>
      </tr>

how can i make it work in IE?????
can i get some help...?

[gits]

try to set display to 'block' ... instead off '' ...