How to show <tr> tag on clicking button and prevent page refresh

My Requirement is to hide a tag initially, if user clicks forwardbutton without checking any radio or checkbutton we have show the tag and have to prevent page refresh. But it is permanently not submitting on click, Plese someone help me.

$(document).ready(function()
{
var y=$('input').filter(':checked').length;
alert(y);
if(y == 0 )
{
   $('#Q1_7_label').parents('TR').hide();       
}
$('#forwardbutton').live('click',function(event)
 {
    var x=$('input').filter(':checked').length;
    if(x开发者_如何学C==0)
     {
      $('#Q1_7_label').parents('TR').show(); 
      return false;
     }
 });

});

$('#forwardbutton').live('click',function(event)
 {
    var x=$('input').filter(':checked').length;
    if(x==0)
     {
      $('#Q1_7_label').parents('TR').show(); 
      return false;
     }
     return true;
 });

Just add return true at the end of the function

Try to replace

return false;

with

event.preventDefault();