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问题:

This is the first time I am using jQuery. I am loading a large background image and when it is loaded I am fading it in over three seconds. This script works on Firefox and Chrome but not in IE (of course!). Is there any fail safe way of making it magically work in IE and is there some prettier way of writing it?

<div class="bgImage" />

$(document).ready(function () {
  // add bg image and fade
  var _image = new Image();
  _image.id = 'newImageId';
  _image.src = "./css/background.jpg";

  $(_image).load(function () {
    $('div.bgImage').css('background-image', 'url(./css/background.jpg)');
    $('div.bgImage').fadeTo(3000, 1);
  });
});

回答1:

use

 $('div.bgImage').animate({ opacity: 1 }, { duration: 3000 });

assuming you are starting of with style="opacity: 0;"

回答2:

HTML

<body>
  <div class="bgImage"></div>
  ...
</body>

CSS

.bgImage {
  position: fixed;
  top: 0; left: 0;
  right: 0; bottom: 0;
  z-index: 1;
  display: none;
}

Javascript

$(function() {
  var src = '../css/background.jpg';
  var ele = $('.bgImage');
  var img = $('<img>', {
    src: src
  }).hide().appendTo(ele).load(function() {
    $(this).remove();
    ele.css('background-image', 'url('+src+')').fadeIn(3000);
  });
});

回答3:

for this you dont need to write that many lines of code this simple code will work for u...

$(document).load(function () {
  $('div.bgImage').css('background-image', 'url(./css/background.jpg)');

  $(document).ready(function () {
    $('div.bgImage').fadeIn(3000);
  });
});