非常实用的jQuery代码段集锦【检测浏览器、滚动

$(document).ready(function() {
   if (navigator.userAgent.match(/msie/i) ){
    alert('I am an old fashioned Inter Explorer');
   }
});

$("a[href='#']").click(function() {
 $("html, body").animate({ scrollTop: 0 }, "slow");
 return false;
});

$(function(){
  var $win = $(window)
  var $nav = $('.mytoolbar');
  var navTop = $('.mytoolbar').length && $('.mytoolbar').offset().;
  var isFixed=0;
  processScroll()
  $win.on('scroll', processScroll)
  function processScroll() {
    var i, scrollTop = $win.scrollTop()
    if (scrollTop >= navTop && !isFixed) {
      isFixed = 1
      $nav.addClass('subnav-fixed')
    } else if (scrollTop <= navTop && isFixed) {
      isFixed = 0
     $nav.removeClass('subnav-fixed')
  }
}

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

$("#textA").bind('copy', function() {
  $('span').text('copy behaviour detected!')
});
$("#textA").bind('paste', function() {
  $('span').text('paste behaviour detected!')
});
$("#textA").bind('cut', function() {
  $('span').text('cut behaviour detected!')
});

var root = location.protocol + '//' + location.host;
$('a').not(':contains(root)').click(function(){
  this.target = "_blank";
});

$('input.nospace').keydown(function(e) {
　　if (e.keyCode == 32) {
　　　　return false;
　　}
});

$(document).ready(function(){
  $(".thumbs img").fadeTo("slow", 0.6); // 透明度设置0.6
  $(".thumbs img").hover(function(){
    $(this).fadeTo("slow", 1.0); //悬停时，设为1
  },function(){
    $(this).fadeTo("slow", 0.6);
  });
});