程序员必知35个jQuery 代码片段

{
for(var i = 0; i<ARGUMENTS.LENGTH; jQuery(?<img { i++)>").attr("src", arguments[i]);
}
}
// how to use
$.preloadImages("image1.jpg");
});

6. 页面样式切换

$(document).ready(function() {
  $("a.Styleswitcher").click(function() {
    //swicth the LINK REL attribute with the value in A REL attribute
    $('link[rel=stylesheet]').attr('href' , $(this).attr('rel'));
  });
// how to use
// place this in your header
<LINK rel=stylesheet type=text/css href="default.css">
// the links
<A href="#" rel=default.css>Default Theme</A>
<A href="#" rel=red.css>Red Theme</A>
<A href="#" rel=blue.css>Blue Theme</A>
});

7. 列高度相同

如果使用了两个CSS列，使用此种方式可以是两列的高度相同。

$(document).ready(function() {
function equalHeight(group) {
  tallest = 0;
  group.each(function() {
    thisHeight = $(this).height();
    if(thisHeight > tallest) {
      tallest = thisHeight;
    }
  });
  group.height(tallest);
}
// how to use
$(document).ready(function() {
  equalHeight($(".left"));
  equalHeight($(".right"));
});
});

8. 动态控制页面字体大小

用户可以改变页面字体大小

$(document).ready(function() {
 // Reset the font size(back to default)
 var originalFontSize = $('html').css('font-size');
  $(".resetFont").click(function(){
  $('html').css('font-size', originalFontSize);
 });
 // Increase the font size(bigger font0
 $(".increaseFont").click(function(){
  var currentFontSize = $('html').css('font-size');
  var currentFontSizeNum = parseFloat(currentFontSize, 10);
  var newFontSize = currentFontSizeNum*1.2;
  $('html').css('font-size', newFontSize);
  return false;
 });
 // Decrease the font size(smaller font)
 $(".decreaseFont").click(function(){
  var currentFontSize = $('html').css('font-size');
  var currentFontSizeNum = parseFloat(currentFontSize, 10);
  var newFontSize = currentFontSizeNum*0.8;
  $('html').css('font-size', newFontSize);
  return false;
 });
});

9. 返回页面顶部功能

For a smooth(animated) ride back to the top(or any location).
$(document).ready(function() {
$('a[href*=#]').click(function() {
 if (location.pathname.replace(/^//,'') == this.pathname.replace(/^//,'')
 && location.hostname == this.hostname) {
  var $target = $(this.hash);
  $target = $target.length && $target
  || $('[name=' + this.hash.slice(1) +']');								 
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