jQuery 常用代码集锦(必看篇)

var tog = false; // or true if they are checked on load$('a').click(function() { $("input[type=checkbox]").attr("checked",!tog); tog = !tog;});

$(document).mousemove(function(e){$(document).ready(function() {$().mousemove(function(e){$('#XY').html("Gbin1 X Axis : " + e.pageX + " | Gbin1 Y Axis " + e.pageY);});});

$('#theGBin1Image').attr('src', 'image.jpg').load(function() {alert('This Image Has Been Loaded');});

var dt = new Date();dt.setSeconds(dt.getSeconds() + 60);document.cookie = "cookietest=1; expires=" + dt.toGMTString();var cookiesEnabled = document.cookie.indexOf("cookietest=") != -1;if(!cookiesEnabled){ //cookies have not been enabled}

var date = new Date();date.setTime(date.getTime() + (x * 60 * 1000));$.cookie('example', 'foo', { expires: date });

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

function clearForm(form) { // iterate over all of the inputs for the form // element that was passed in $(':input', form).each(function() { var type = this.type; var tag = this.tagName.toLowerCase(); // normalize case // it's ok to reset the value attr of text inputs, // password inputs, and textareas if (type == 'text' || type == 'password' || tag == 'textarea')  this.value = ""; // checkboxes and radios need to have their checked state cleared // but should *not* have their 'value' changed else if (type == 'checkbox' || type == 'radio')  this.checked = false; // select elements need to have their 'selectedIndex' property set to -1 // (this works for both single and multiple select elements) else if (tag == 'select')  this.selectedIndex = -1; });};

$(document).ready(function() { $('form').submit(function() { if(typeof jQuery.data(this, "disabledOnSubmit") == 'undefined') {  jQuery.data(this, "disabledOnSubmit", { submited: true });  $('input[type=submit], input[type=button]', this).each(function() {  $(this).attr("disabled", "disabled");  });  return true; } else {  return false; } });});

$(function(){ $("select#ctlJob").change(function(){ $.getJSON("/select.php",{id: $(this).val(), ajax: 'true'}, function(j){  var options = '';  for (var i = 0; i < j.length; i++) {  options += '<option value="' + j[i].optionValue + '">' + j[i].optionDisplay + '</option>';  }  $("select#ctlPerson").html(options); }) })})

.filter(":not(:has(.selected))") //去掉所有不包含class为.selected的元素

//jQuery 1.4.* includes support for the has method. This method will find //if a an element contains a certain other element class or whatever it is //you are looking for and do anything you want to them. $("input").has(".email").addClass("email_icon");

//Look for the media-type you wish to switch then set the href to your new style sheet $('link[media='screen']').attr('href', 'Alternative.css'); 

//Toggle class allows you to add or remove a class //from an element depending on the presence of that //class. Where some developers would use: a.hasClass('blueButton') ? a.removeClass('blueButton') : a.addClass('blueButton'); //toggleClass allows you to easily do this using a.toggleClass('blueButton');

$('#thatdiv').replaceWith('fnuh');

$('#foo').bind('click', function() {  alert('User clicked on "foo."'); }); 

jQuery.preloadImages = function() { for(var i = 0; i').attr('src', arguments[i]); } }; // Usage $.preloadImages('image1.gif', '/path/to/image2.png', 'some/image3.jpg'); 

$('button.someClass').live('click', someFunction); //Note that in jQuery 1.4.2, the delegate and undelegate options have been //introduced to replace live as they offer better support for context //For example, in terms of a table where before you would use.. // .live() $("table").each(function(){ $("td", this).live("hover", function(){ $(this).toggleClass("hover"); }); }); //Now use.. $("table").delegate("td", "hover", function(){ $(this).toggleClass("hover");});

jQuery.fn.autoscroll = function(selector) { $('html,body').animate( {scrollTop: $(selector).offset().top}, );}//Then to scroll to the class/area you wish to get to like this:$('.area_name').autoscroll();

Detect Safari (if( $.browser.safari)),Detect IE6 and over (if ($.browser.msie && $.browser.version > 6 )),Detect IE6 and below (if ($.browser.msie && $.browser.version <= 6 )),Detect FireFox 2 and above (if ($.browser.mozilla && $.browser.version >= '1.8' )

jQuery.fn.maxLength = function(max){ this.each(function(){ var type = this.tagName.toLowerCase(); var inputType = this.type? this.type.toLowerCase() : null; if(type == "input" && inputType == "text" || inputType == "password"){  //Apply the standard maxLength  this.maxLength = max; } else if(type == "textarea"){  this.onkeypress = function(e){  var ob = e || event;  var keyCode = ob.keyCode;  var hasSelection = document.selection? document.selection.createRange().text.length > 0 : this.selectionStart != this.selectionEnd;  return !(this.value.length >= max && (keyCode > 50 || keyCode == 32 || keyCode == 0 || keyCode == 13) && !ob.ctrlKey && !ob.altKey && !hasSelection);  };  this.onkeyup = function(){  if(this.value.length > max){   this.value = this.value.substring(0,max);  }  }; } });};//Usage:$('#gbin1textarea').maxLength(500);

var cloned = $('#gbin1div').clone();

jQuery.fn.center = function () { this.css('position','absolute'); this.css('top', ( $(window).height() - this.height() ) / +$(window).scrollTop() + 'px'); this.css('left', ( $(window).width() - this.width() ) / 2+$(window).scrollLeft() + 'px');return this;}//Use the above function as: $('#gbin1div').center();

jQuery('#meeting_tabs ul li').click(function(){  jQuery(this).addClass('tabulous_active').siblings().removeClass('tabulous_active');  jQuery('#tabs_container>.pane:eq('+jQuery(this).index()+')').show().siblings().hide();  })<div id="meeting_tabs">    <ul>      <li class="tabulous_active"><a href="#" title="">进行中</a></li>      <li><a href="#" title="">未开始</a></li>      <li><a href="#" title="">已结束</a></li>      <li><a href="#" title="">全部</a></li>     </ul> <div id="tabs_container">   <div class="pane"  >1</div>   <div class="pane"  >2</div>   <div class="pane"  >3</div>   <div class="pane"  >4</div> </div></div>