$(document).ready(function(){
  $(document).bind("contextmenu",function(e){
    return false;
  });
});

$(document).ready(function() {
$("input.text1").val("Enter your search text here");
  textFill($('input.text1'));
});
  function textFill(input){ //input focus text function
   var originalvalue = input.val();
   input.focus( function(){
     if( $.trim(input.val()) == originalvalue ){ input.val(''); }
   });
   input.blur( function(){
     if( $.trim(input.val()) == '' ){ input.val(originalvalue); }
   });
}

$(document).ready(function() {
  //Example 1: Every link will open in a new window
  $('a[href^="http://"]').attr("target", "_blank");
  //Example 2: Links with the rel="external" attribute will only open in a new window
  $('a[@rel$='external']').click(function(){
   this.target = "_blank";
  });
});
// how to use
<a href="http://www.opensourcehunter.com" rel=external>open link</a>

$(document).ready(function() {
// Target Firefox 2 and above
if ($.browser.mozilla && $.browser.version >= "1.8" ){
  // do something
}
// Target Safari
if( $.browser.safari ){
  // do something
}
// Target Chrome
if( $.browser.chrome){
  // do something
}
// Target Camino
if( $.browser.camino){
  // do something
}
// Target Opera
if( $.browser.opera){
  // do something
}
// Target IE6 and below
if ($.browser.msie && $.browser.version <= 6 ){
  // do something
}
// Target anything above IE6
if ($.browser.msie && $.browser.version > 6){
  // do something
}
});

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

$(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
  || $('[name=' + this.hash.slice(1) +']');
  if ($target.length) {
 var targetOffset = $target.offset().top;
 $('html,body')
 .animate({scrollTop: targetOffset}, 900);
  return false;
  }
 }
 });
// how to use
// place this where you want to scroll to
<A name=top></A>
// the link
<A href="#top">go to top</A>
});

$(document).ready(function() {
  $().mousemove(function(e){
   //display the x and y axis values inside the div with the id XY
  $('#XY').html("X Axis : " + e.pageX + " | Y Axis " + e.pageY);
 });
// how to use
<DIV id=XY></DIV>
});

有时候你需要确保图片完成加载完成以便执行后面的操作：
$('img').load(function () {
 console.log('image load successful');
});

$('img').on('error', function () {
 $(this).prop('src', 'img/broken.png');
});

$(document).ready(function() {
  window.setTimeout(function() {
   // do something
  }, 1000);
});