先写点css样式：
*{margin:0;padding:0}
.btn1{
position:absolute;right:0;bottom:0;
z-index:23;
}
.div1{
position:relative;z-index:1;
width:423px;
height:230px;
}
这是全屏的封装函数：
function aaa(element){
if(element.requestFullscreen){
element.requestFullscreen();
}else if(element.mozRequestFullScreen){
element.mozRequestFullscreen();
}else if(element.webkitRequestFullscreen){
element.webkitRequestFullscreen();
}else if(element.msRequestFullscreen){
element.msRequestFullscreen();
}
}
这是缩小的封装函数：
function bbb(){
if(document.exitFullscreen){
document.exitFullscreen();
}else if(document.mozExitFullscreen){
document.mozExcitFullscreen();
}else if(document.webkitExitFullscreen){
document.webkitExitFullscreen();
}
}
函数调用
window.onload=function(){
varoV=document.getElementById('ov');
varoBtn=document.getElementById('btn1')；
oBtn.onclick=function(){
aaa(document.getElementById('ov'));
};
oV.ondblclick=function(){
bbb();
};
};
