Display a div below an input field of the exact width using jQuery

I currently use the following code to position a div directly below an input text field on focus. The problem is the width of the div varies between browsers. Is there a way to ensure the div that appears is the exact width as my input field?

  // get the field position
  var inputField = $('#inputfield');
  var fieldDiv = $('div.divname');
  var sf_pos    = field.offset();
  va开发者_运维技巧r sf_top    = sf_pos.top;
  var sf_left   = sf_pos.left;
  // get the input field size
  var sf_height = inputField.height();
  var sf_width  = inputField.width();

  fieldDiv.css("position","absolute");
  fieldDiv.css("left", sf_left);
  fieldDiv.css("top", sf_top + sf_height + 6);
  fieldDiv.css("width", sf_width);

  $('#inputfield').focus(function() {
    fieldDiv.fadeIn('medium');
  }).blur(function() {
    fieldDiv.fadeOut('medium');
  });

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i think this may be related to IE not respecting the box model, and some browsers will also include borders in the widths and others wont.

have you tried using outterWidth() instead of width()?

also You can hack it and add offsets that are browser dependent, for example:

width += ($.support.boxModel ? 0 : 2);

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This is an inevitable part of using CSS. Sure, you can hack away at your CSS until the early morning hours so that everything renders the same in all browsers with the same CSS, but we all have deadlines. I've found the simplest solution for tweaking element dimensions between browsers is conditional comments. You can also define separate style sheet files for different browsers (that contain only the differences) and load those accordingly.