var oV = document.getElementById(‘v1‘);
aInput[4].onclick=function()
	{
		  launchFullScreen(oV);
	}
	
	function launchFullScreen(oV) {
    	  if(oV.requestFullScreen) {
        	    oV.requestFullScreen(); 
   		   } else if(oV.mozRequestFullScreen) {
       		     oV.mozRequestFullScreen(); 
    	   } else if(oV.webkitRequestFullScreen) {
       		     oV.webkitRequestFullScreen(); 
   	 	  }
	}   
	
原文:http://www.cnblogs.com/xiaoyangtian/p/7995024.html