jQuery search each table row for a particular td

Consider there's a table with rows to which a td with class x is added by jQuery on the fly (during DOM manipulation). Later when the user submit's this table (table being part of a form), i want to search all the rows for existence of this particular td. If this td is found then the function should return false, else true. However this piece of code does not work, any suggestions开发者_如何学JAVA?

function validate(){
$('form#newuser table tr').each(function(){
    if($(this).find('td.x')){
        return false;
    }
});
return true;
}

function validate() { 
  return ($('form#newuser table tr td.x').length == 0);
};

$(<selector>).length returns the number of DOM elements matched by the <selector>.

you can forget the each loop, too and really shorten this up since your selector will find ALL tr's (it's a set)...

function validate(){
   if($('form#newuser table tr.x').length){
     return false;
   }

});
return true;
}

i havent tested this, but it should work.

Try this code...

$('#YourFormName TABLE TBODY TR').each(function()
{        
 if $(this).children('td').hasClass('x')
   {
     return false;
   }
});