Stopping onclick from firing when onclientclick is false?

Question

Is it possible to use the onclientclick property of a button to do a clientside check. If the check returns true, then fire the onclick

Answer 1

Yes you can, In onclientClick function call use preventDefault()

function onclientClickFun(e)
{
  if(!IsValidationSuccess)
 {
   e.preventDefault();
 }

}

OR

function onclientClickFun(e)
{
  if(!IsValidationSuccess)
 {
   return false;
 }

}