[代码] 图片预加载
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( function ($)
{ |
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var cache
= []; |
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//
Arguments are image paths relative to the current page. |
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$.preLoadImages
= function ()
{ |
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var args_len
= arguments.length; |
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for ( var i
= args_len; i--;) { |
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var cacheImage
= document.createElement( 'img' ); |
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cacheImage.src
= arguments[i]; |
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cache.push(cacheImage); |
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} |
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} |
12 |
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jQuery.preLoadImages( "image1.gif" , "/path/to/image2.png" ); |
[代码] 在新窗口打开链接 (target=”blank”)
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$( 'a[@rel$=' external ']' ).click( function (){ |
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this .target
= "_blank" ; |
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}); |
4 |
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/* |
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Usage: |
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<a
href="http://www.catswhocode.com" rel="external">catswhocode.com</a> |
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*/ |
[代码] 当支持 JavaScript 时为 body 增加 class
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/*
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 */ |
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$( 'body' ).addClass( 'hasJS' ); |
[代码] 平滑滚动页面到某个锚点
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$(document).ready( function ()
{ |
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$( "a.topLink" ).click( function ()
{ |
03 |
$( "html,
body" ).animate({ |
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scrollTop:
$($( this ).attr( "href" )).offset().top
+ "px" |
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},
{ |
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duration:
500, |
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easing: "swing" |
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}); |
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return false ; |
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}); |
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}); |
[代码] 鼠标滑动时的渐入和渐出
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$(document).ready( function (){ |
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$( ".thumbs
img" ).fadeTo( "slow" ,
0.6); //
This sets the opacity of the thumbs to fade down to 60% when the page loads |
3 |
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$( ".thumbs
img" ).hover( function (){ |
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$( this ).fadeTo( "slow" ,
1.0); //
This should set the opacity to 100% on hover |
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}, function (){ |
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$( this ).fadeTo( "slow" ,
0.6); //
This should set the opacity back to 60% on mouseout |
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}); |
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}); |
[代码] 制作等高的列
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var max_height
= 0; |
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$( "div.col" ).each( function (){ |
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if ($( this ).height()
> max_height) { max_height = $( this ).height();
} |
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}); |
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$( "div.col" ).height(max_height); |
[代码] 在一些老的浏览器上启用 HTML5 的支持
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( function (){ |
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if (! /*@cc_on!@*/ 0) |
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return ; |
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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])} |
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})() |
06 |
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//然后在head中引入该js |
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<!--[ if lt
IE 9]> |
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<script
src= "http://html5shim.googlecode.com/svn/trunk/html5.js" ></script> |
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<![endif]--> |
[代码] 测试浏览器是否支持某些 CSS3 属性
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var supports
= ( function ()
{ |
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var div
= document.createElement( 'div' ), |
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vendors
= 'Khtml
Ms O Moz Webkit' .split( '
' ), |
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len
= vendors.length; |
05 |
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return function (prop)
{ |
07 |
if (
prop in div.style
) return true ; |
08 |
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prop
= prop.replace(/^[a-z]/, function (val)
{ |
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return val.toUpperCase(); |
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}); |
12 |
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while (len--)
{ |
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if (
vendors[len] + prop in div.style
) { |
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//
browser supports box-shadow. Do what you need. |
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//
Or use a bang (!) to test if the browser doesn't. |
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return true ; |
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} |
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} |
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return false ; |
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}; |
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})(); |
23 |
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if (
supports( 'textShadow' )
) { |
25 |
document.documentElement.className
+= '
textShadow' ; |
[代码] 获取 URL 中传递的参数
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$.urlParam
= function (name){ |
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var results
= new RegExp( '[\\?&]' +
name + '=([^&#]*)' ).exec(window.location.href); |
3 |
if (!results)
{ return 0;
} |
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return results[1]
|| 0; |
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} |
[代码] 禁用表单的回车键提交
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$( "#form" ).keypress( function (e)
{ |
2 |
if (e.which
== 13) { |
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return false ; |
4 |
} |
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}); |