//进入全屏

functionenterFullScreen() {

varde=document.documentElement;

if(de.requestFullscreen) {

de.requestFullscreen();

}elseif(de.mozRequestFullScreen) {

de.mozRequestFullScreen();

}elseif(de.webkitRequestFullScreen) {

de.webkitRequestFullScreen();

}

}

//退出全屏

functionexitFullScreen() {

varde=document;

if(de.exitFullscreen) {

de.exitFullscreen();

}elseif(de.mozCancelFullScreen) {

de.mozCancelFullScreen();

}elseif(de.webkitCancelFullScreen) {

de.webkitCancelFullScreen();

}

}

做一个点击事件，调用函数名就可以了，弊端就是必须要做点击事件，浏览器不允许页面一打开默认全屏，必须要用户点击切换