jquery - check if parentNode is undefined -


i'm getting typeerror parentnode undefined. how can check if parentnode undefined?

here method:

    function updateimages(myrow) {          var rowinputs =  j$(myrow).find('input[type="text"]');         var contact = (j$(rowinputs[0]).val());          var user = (j$(rowinputs[1]).val());         var account = (j$(rowinputs[2]).val());          if (contact !== '') {             j$(rowinputs[0].parentnode).find('img').show();             j$(rowinputs[1].parentnode).find('img').hide();             j$(rowinputs[2].parentnode).find('img').hide();         }             else if (user !== '') {             console.log('user not blank');             console.log(j$(rowinputs[1]));             console.log(j$(rowinputs[1].parentnode));             j$(rowinputs[0].parentnode).find('img').hide();             j$(rowinputs[1].parentnode).find('img').show();             j$(rowinputs[2].parentnode).find('img').hide();         }         else if (account !== '') {             j$(rowinputs[0].parentnode).find('img').hide();             j$(rowinputs[1].parentnode).find('img').hide();             j$(rowinputs[2].parentnode).find('img').show();         }         if (account !== '' && contact !== '') {             j$(rowinputs[0].parentnode).find('img').show();             j$(rowinputs[1].parentnode).find('img').hide();             j$(rowinputs[2].parentnode).find('img').hide();         }     } </script>

i need check if parentnode rowinputs[1].parentnode undefined , if parentnode rowinputs[2].parentnode undefined.

thanks help. regards.

this suggestion:

function updateimages(myrow) {      var rowinputs =  j$(myrow).find('input[type="text"]');     var contact = rowinputs.eq(0);      var user = rowinputs.eq(1);     var account = rowinputs.eq(2);      var cont = contact.parent().find('img');     var usr = user.parent().find('img');     var aco = account.parent().find('img');      if (contact.val() !== '') {         cont.show();         usr.hide();         aco.hide();     }         else if (user.val() !== '') {         console.log('user not blank');         console.log(user);         console.log(user.parent());         cont.hide();         usr.show();         aco.hide();     }     else if (acontount.val() !== '') {         cont.hide();         usr.hide();         aco.show();     }     /* redundant same first if     if (acontount.val() !== '' && contact.val() !== '') {         j$(rowinputs[0]).parent().find('img').show();         j$(rowinputs[1]).parent().find('img').hide();         j$(rowinputs[2]).parent().find('img').hide();     }     */ }

you code assumes there 3 elements per row , throw error because of that. if use .eq() instead jquery object , no undefined error. if post html maybe can find better way optimize code.


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