10个很棒的jQuery代码片段

(function($) {  var cache = [];  // Arguments are image paths relative to the current page.  $.preLoadImages = function() {   var args_len = arguments.length;   for (var i = args_len; i--;) {    var cacheImage = document.createElement('img');    cacheImage.src = arguments[i];    cache.push(cacheImage);   }  }  jQuery.preLoadImages("image1.gif", "/path/to/image2.png"); 

$('a[@rel$='external']').click(function(){    this.target = "_blank"; });  /*   Usage:   <a href="http://www.catswhocode.com" rel="external">catswhocode.com</a> */ 

/* 该代码只有1行，但是最简单的用来检测浏览器是否支持 JavaScript 的方法，如果支持 JavaScript 就在 body 元素增加一个 hasJS 的 class */ $('body').addClass('hasJS'); 

$(document).ready(function() {   $("a.topLink").click(function() {     $("html, body").animate({       scrollTop: $($(this).attr("href")).offset().top + "px"     }, {       duration: 500,       easing: "swing"     });     return false;   }); }); 

$(document).ready(function(){   $(".thumbs img").fadeTo("slow", 0.6); // This sets the opacity of the thumbs to fade down to 60% when the page loads    $(".thumbs img").hover(function(){     $(this).fadeTo("slow", 1.0); // This should set the opacity to 100% on hover   },function(){     $(this).fadeTo("slow", 0.6); // This should set the opacity back to 60% on mouseout   }); }); 

var max_height = 0; $("div.col").each(function(){   if ($(this).height() > max_height) { max_height = $(this).height(); } }); $("div.col").height(max_height); 

(function(){   if(!/*@cc_on!@*/0)     return;   var e = "abbr,article,aside,audio,bb,canvas,datagrid,datalist,details,dialog,eventsource,figure,footer,header,hgroup,mark,menu,meter,nav,output,progress,section,time,video".split(','),i=e.length;while(i--){document.createElement(e[i])} })()  //然后在head中引入该js <!--[if lt IE 9]> <script src="http://html5shim.googlecode.com/svn/trunk/html5.js"></script> <![endif]--> 

var supports = (function() {   var div = document.createElement('div'),    vendors = 'Khtml Ms O Moz Webkit'.split(' '),    len = vendors.length;    return function(prop) {    if ( prop in div.style ) return true;     prop = prop.replace(/^[a-z]/, function(val) {      return val.toUpperCase();    });     while(len--) {      if ( vendors[len] + prop in div.style ) {       // browser supports box-shadow. Do what you need.       // Or use a bang (!) to test if the browser doesn't.       return true;      }    }    return false;   }; })();  if ( supports('textShadow') ) {   document.documentElement.className += ' textShadow'; 

$.urlParam = function(name){   var results = new RegExp('[//?&]' + name + '=([^&#]*)').exec(window.location.href);   if (!results) { return 0; }   return results[1] || 0; } 

$("#form").keypress(function(e) {  if (e.which == 13) {   return false;  } });