var obox = document.getelementbyid('box');
	var ocover = document.queryselector('#box .cover');
	var odt = document.queryselector('#box .cover dt');
	var ovideo = document.queryselector('#box video');
	var close = document.queryselector('#box a');
	var bool = true;
	close.onclick = function(ev){
        ev.stoppropagation();
		obox.style.display = 'none';
	}
	obox.onclick = function(){
		if (bool){
			ocover.style.visibility = 'hidden';
			odt.style.opacity = 0;
			ovideo.play();
			bool = false;
		}else{
			ocover.style.visibility = 'visible';
			odt.style.opacity = 1;
			ovideo.pause();
			bool = true;
		}
	}



	var browser={
    versions:function(){   
           var u = navigator.useragent, app = navigator.appversion;   
           return {//移动终端浏览器版本信息   
                trident: u.indexof('trident') > -1, //ie内核  
                presto: u.indexof('presto') > -1, //opera内核  
                webkit: u.indexof('applewebkit') > -1, //苹果、谷歌内核  
                gecko: u.indexof('gecko') > -1 && u.indexof('khtml') == -1, //火狐内核  
                mobile: !!u.match(/applewebkit.*mobile.*/), //是否为移动终端  
                ios: !!u.match(/\(i[^;]+;( u;)? cpu.+mac os x/), //ios终端  
                android: u.indexof('android') > -1 || u.indexof('linux') > -1, //android终端或者uc浏览器  
                iphone: u.indexof('iphone') > -1 , //是否为iphone或者qqhd浏览器  
                ipad: u.indexof('ipad') > -1, //是否ipad    
                webapp: u.indexof('safari') == -1, //是否web应该程序，没有头部与底部  
                weixin: u.indexof('micromessenger') > -1, //是否微信   
                qq: u.match(/\sqq/i) == " qq" //是否qq  
            };  
         }(),  
         language:(navigator.browserlanguage || navigator.language).tolowercase()  
}   

$(document).ready(function(){
    $('#vid_mask').bind('click', function() {
      $('#vid')[0].play();
    });
    $('#vid')[0].click();
    $('#vid')[0].play();
});

  if(browser.versions.mobile || browser.versions.ios || browser.versions.android ||   
    browser.versions.iphone || browser.versions.ipad){        
      var v=document.getelementbyid('vid');
      var s=document.getelementbyid('yx');
       var aut=v.getattributenode('autoplay'); 
        
        v.removeattributenode(aut);
         
    
       var auts=s.getattributenode('autoplay');  
         
           s.removeattributenode(auts);
      
    }else{
     var auto=document.createattribute('autoplay');
     auto.nodevalue="true";
    v.setattributenode(auto);
    s.setattributenode(auto);
    }