利用浏览器全屏api实现js全屏_jquery

(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);
}
});
};
}

// export api
window.fullScreenApi = fullScreenApi;
})();

$(function(){
$("#fullScreenBtn").click(function(){
$("#fullScreen").requestFullScreen();
});

if(window.top != self){
$("#tip").text("iframe里面不能演示该功能！请点击右下角的全屏查看！").show();
}
});

if (!fullScreenApi.supportsFullScreen) {
alert("您的破浏览器不支持全屏API哦，请换高版本的chrome或者firebox！");
}