document.write('<style>.test{ width:100px; font-size:16px; }    .downT{ width:100%; font-size:14px; }    .downT a{ display:block; overflow:hidden; padding:15px 10px; color:#ffffff; }    .downT .fr img{ height:16px; vertical-align:middle; margin-right:3px; }    .downT .fr span{ vertical-align:middle; }    .downT-1{ background-color:#ffffff; display:none; }    .downT-1 img.fl{ height:45px; }    .downT-1 .fr{ background: -moz-linear-gradient( top,#0FB8AD,#0ACC9C); background: -webkit-linear-gradient( top,#0FB8AD,#0ACC9C); background: -ms-linear-gradient( top,#0FB8AD,#0ACC9C);background: linear-gradient( top,#0FB8AD,#0ACC9C); padding:8px 16px; border-radius:50px; margin-top:5px; }    .downT-1-null{ height:85px; display:none; }    .downT-2{ background: -moz-linear-gradient( top,#0FB8AD,#0ACC9C); background: -webkit-linear-gradient( top,#0FB8AD,#0ACC9C); background: -ms-linear-gradient( top,#0FB8AD,#0ACC9C);background: linear-gradient( top,#0FB8AD,#0ACC9C); display:none; }    .downT-2 img.fl{ height:37px; }    .downT-2 .fr{ padding:8px 16px; border-radius:5px; border:1px solid #67D5C8; }    .downT-2-null{ height:77px; display:none; }    .downB{bottom:0; width:100%; font-size:16px; }    .downB a{ display:block; color:#ffffff; padding:10px 0; }    .downB div img{ vertical-align:middle; margin-right:5px; }    .downB span{ vertical-align:middle; }    .downB-1{ background-color:#ffffff; display:none; }    .downB-1 div{ background: -moz-linear-gradient( top,#0FB8AD,#0ACC9C); background: -webkit-linear-gradient( top,#0FB8AD,#0ACC9C); background: -ms-linear-gradient( top,#0FB8AD,#0ACC9C);background: linear-gradient( top,#0FB8AD,#0ACC9C); width:90%; margin:0 auto; padding:10px 0; text-align:center; border-radius:5px; }    .downB-1 div img{ height:22px; }    .downB-1-null{ height:73px; display:none; }    .downB-2{ background-color:#ffffff; display:none; }    .downB-2 div{ background: -moz-linear-gradient( top,#0FB8AD,#0ACC9C); background: -webkit-linear-gradient( top,#0FB8AD,#0ACC9C); background: -ms-linear-gradient( top,#0FB8AD,#0ACC9C);background: linear-gradient( top,#0FB8AD,#0ACC9C); width:60%; margin:0 auto; padding:10px 0; text-align:center; border-radius:50px; }    .downB-2 div img{ height:18px; }    .downB-2-null{ height:71px; display:none; }    .downB-3{ background-color:#ffffff; display:none; }    .downB-3 a{ color:#0FB8AD; }    .downB-3 div{ width:60%; margin:0 auto; padding:10px 0; text-align:center; border-radius:50px; border:1px solid #0FB8AD; }    .downB-3 div img{ height:18px; }    .downB-3-null{ height:71px; display:none; }    .downB-m a{ overflow:hidden; padding:15px 10px;}    .downB-m .fr img{ height:16px; vertical-align:middle; margin-right:3px; }    .downB-m .fr span{ vertical-align:middle; }    </style><div class="downB downB-1" id="b1"><a href="http://a.app.qq.com/o/simple.jsp?pkgname=com.runbey.ybjk"><div><img src="images/xiazai_2_d.png"><span>免费下载 更多惊喜</span></div></a></div><div class="downB downB-2" id="b2"><a href="http://a.app.qq.com/o/simple.jsp?pkgname=com.runbey.ybjk"><div><img src="images/xiazai_b.png"><span>下载元贝驾考</span></div></a></div><div class="downB downB-3" id="b3"><a href="http://a.app.qq.com/o/simple.jsp?pkgname=com.runbey.ybjk"><div><img src="images/xiazai_l.png"><span>下载元贝驾考</span></div></a></div><div class="downB downB-m downT-1" id="b4"><a href="http://a.app.qq.com/o/simple.jsp?pkgname=com.runbey.ybjk"><div class="fr"><img src="images/xiazai_1.png"><span>免费下载</span></div><img class="fl" src="images/logo_1.png"></a></div><div class="downB downB-m downT-2" id="b5"><a href="http://a.app.qq.com/o/simple.jsp?pkgname=com.runbey.ybjk"><div class="fr"><img src="images/xiazai_2_d.png"><span>免费下载</span></div><img class="fl" src="images/logo_2.png"></a></div>');		// 底部下载随机出
		var arr=["b1","b2","b3","b4","b5"];
		var j=parseInt(Math.random()*(5)+0);
		var id=arr[j];
		$("#"+id).show();