图片预加载
04 | $.preLoadImages = function () { |
05 | var args_len = arguments.length; |
06 | for ( var i = args_len; i--;) { |
07 | var cacheImage = document.createElement( 'img' ); |
08 | cacheImage.src = arguments[i]; |
09 | cache.push(cacheImage); |
13 | jQuery.preLoadImages( "image1.gif" , "/path/to/image2.png" ); |
[代码] 在新窗口打开链接 (target=”blank”)
1 | $( 'a[@rel$=' external ']' ).click( function (){ |
2 | this .target = "_blank" ; |
[代码] 当支持 JavaScript 时为 body 增加 class
2 | $( 'body' ).addClass( 'hasJS' ); |
[代码] 平滑滚动页面到某个锚点
01 | $(document).ready( function () { |
02 | $( "a.topLink" ).click( function () { |
03 | $( "html, body" ).animate({ |
04 | scrollTop: $($( this ).attr( "href" )).offset().top + "px" |
[代码] 鼠标滑动时的渐入和渐出
1 | $(document).ready( function (){ |
2 | $( ".thumbs img" ).fadeTo( "slow" , 0.6); |
4 | $( ".thumbs img" ).hover( function (){ |
5 | $( this ).fadeTo( "slow" , 1.0); |
7 | $( this ).fadeTo( "slow" , 0.6); |
[代码] 制作等高的列
2 | $( "div.col" ).each( function (){ |
3 | if ($( this ).height() > max_height) { max_height = $( this ).height(); } |
5 | $( "div.col" ).height(max_height); |
[代码] 在一些老的浏览器上启用 HTML5 的支持
04 | 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])} |
[代码] 测试浏览器是否支持某些 CSS3 属性
01 | var supports = ( function () { |
02 | var div = document.createElement( 'div' ), |
03 | vendors = 'Khtml Ms O Moz Webkit' .split( ' ' ), |
06 | return function (prop) { |
07 | if ( prop in div.style ) return true ; |
09 | prop = prop.replace(/^[a-z]/, function (val) { |
10 | return val.toUpperCase(); |
14 | if ( vendors[len] + prop in div.style ) { |
24 | if ( supports( 'textShadow' ) ) { |
25 | document.documentElement.className += ' textShadow' ; |
[代码] 获取 URL 中传递的参数
1 | $.urlParam = function (name){ |
2 | var results = new RegExp( '[\\?&]' + name + '=([^&#]*)' ).exec(window.location.href); |
3 | if (!results) { return 0; } |
4 | return results[1] || 0; |
[代码] 禁用表单的回车键提交
1 | $( "#form" ).keypress( function (e) { |
、把所有带有#的空链接换成不友情的链接
- $('a[href="#"]').each(function() {
- $(this).attr('href', 'javascript:void(0)')
- });
2、jQuery全选与取消全选插件
- (function($){
- $.fn.checkall = function(options){
- var defaults = {chname:"checkname[]", callback:null},
- options = $.extend(defaults, options),
- $obj = $(this),
- $items = $("input[name='"+options.chname+"']"),
- checkedItem = 0;
- $items.click(function(){
- if($items.filter(":checked").length === $items.length){
- $obj.attr("checked",true);
- }else{
- $obj.removeAttr("checked");
- }
- checkedItem = $items.filter(":checked").length;
- if(typeof options.callback === "function") options.callback(checkedItem);
- });
- return $obj.each(function(){
- $(this).click(function(){
- if($(this).attr("checked")){
- $items.attr("checked",true);
- }else{
- $items.removeAttr("checked");
- }
- checkedItem = $items.filter(":checked").length;
- if(typeof options.callback === "function") options.callback(checkedItem);
- });
- });
- }
- })(jQuery);
3、滚动条自动滚到顶部方法
- $("html,body").animate({scrollTop: 0}, "slow");
4、滚动条自动滚到底部方法
- var s = $("body").height()-$(window).height();
- $("html,body").animate({scrollTop: s}, "slow");
5、jQuery自动根据图片高度宽度缩
- jQuery.fn.ImageAutoSize = function(width,height){
- $(“img”,this).each(function(){
- var image = $(this);
- if(image.width()>width){
- image.width(width);
- image.height(width/image.width()*image.height());
- }
- if(image.height()>height){
- image.height(height);
- image.width(height/image.height()*image.width());
- }
- });
- }
调用:先引用上面的脚本或将上页的脚本放入自己的JS库,然后只要再加 $(function(){ $(“图片组所在的容器”).ImageAutoSize(限制最大宽,限制最大高);});
6、JQuery IFrame框架高度自适应(支持嵌套–兼容IE,ff,safafi,chrome)
- $("#IframeID").load(function() {
- $(this).height($(this).contents().height());
- })