javascript - Jquery textarea.val('') adds line break on FIRST enter press? -


i have little chat setup, , on enter press if text area in focus have set submit chat database , clear text area. unfortunately though, first time 1 presses enter adds linebreak in text area, in browser. if type , press enter again, there's still 1 line break there. missing something?

thanks!

    $(document).keypress(function(keypress) {         if (keypress.which == 13) {             if ($('#chattext').is(':focus')) {                 if ($('#chattext').val().length > 0) {                     chatvalue = $('#chattext').val();                     $('#chattext').val($('#chattext').val().substring(0,0));                     $.ajax({                         type: 'post',                         url: 'submitchat.php',                         data: { chattext: chatvalue },                         success: function(result) {                             $('#chat_text').html(result);                             document.getelementbyid('chat_text').scrolltop = 9999999;                         }                     });                 }             }         }     });

why don't clear it?

$('#chattext').keypress(function(e) {     if (e.which == 13) {         var value = $(this).val();          if (value.length > 0) {             $(this).val('');              $.ajax({                 type: 'post',                 url: 'submitchat.php',                 data: {                     chattext: value                 },                 success: function(result) {                     $('#chat_text').html(result);                     this.scrolltop = 9999999;                 }             });         }     } });

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