一个支持chrome、firefox的全屏插件

　　话不多说，直接上demo，你可以点击下面的图片看效果。



　　插件代码

(function(){
var fullScreenApi = {
supportsFullScreen: false,
isFullScreen: function() { return false; },
requestFullScreen: function() {},
cancelFullScreen: function() {},
fullScreenEventName: '',
prefix: ''
},
browserPrefixes = 'webkit moz o ms khtml'.split(' ');
// check for native support
if (typeof document.cancelFullScreen != 'undefined') {
fullScreenApi.supportsFullScreen = true;
} else {
// check for fullscreen support by vendor prefix
for (var i = 0, il = browserPrefixes.length; i < il; i++ ) {
fullScreenApi.prefix = browserPrefixes[i];
if (typeof document[fullScreenApi.prefix + 'CancelFullScreen' ] != 'undefined' ) {
fullScreenApi.supportsFullScreen = true;
break;
}
}
}
// update methods to do something useful
if (fullScreenApi.supportsFullScreen) {
fullScreenApi.fullScreenEventName = fullScreenApi.prefix + 'fullscreenchange';
fullScreenApi.isFullScreen = function() {
switch (this.prefix) {
case '':
return document.fullScreen;
case 'webkit':
return document.webkitIsFullScreen;
default:
return document[this.prefix + 'FullScreen'];
}
}
fullScreenApi.requestFullScreen = function(el) {
return (this.prefix === '') ? el.requestFullScreen() : el[this.prefix + 'RequestFullScreen']();
}
fullScreenApi.cancelFullScreen = function(el) {
return (this.prefix === '') ? document.cancelFullScreen() : document[this.prefix + 'CancelFullScreen']();
}
}
// jQuery plugin
if (typeof jQuery != 'undefined') {
jQuery.fn.requestFullScreen = function() {
return this.each(function() {
if (fullScreenApi.supportsFullScreen) {
fullScreenApi.requestFullScreen(this);
}
});
};
}
window.fullScreenApi = fullScreenApi;
})();

　　调用代码

$(function(){
$('#fullscreenbtn').click(function(){
if(window.fullScreenApi.supportsFullScreen){
window.fullScreenApi.requestFullScreen(document.getElementById('fullscreenbox'));
}else{
alert('就你这浏览器，基本就告别全屏功能了');
}
});
});

　　HTML代码结构

<a id="fullscreenbtn">
<img id="fullscreenbox" style="display: block; margin-left: auto; margin-right: auto;" src="http://pic002.cnblogs.com/images/2012/277258/2012041400022949.gif" alt="" />
</a>

　　基于fullscreen功能，我们就可以做出很多效果，比如相册：

　　http://eikes.github.com/jquery.fullscreen.js/

　　又比如视频中的全屏功能：

　　http://mediaelementjs.com/

　　当然也不能不说我的HoorayOS中窗口全屏的使用：

　　http://www.hoorayos.com/





　　插件来源地址：http://johndyer.name/native-fullscreen-javascript-api-plus-jquery-plugin/