//添加手机端视图
var oMeta = document.createElement('meta');
oMeta.content = 'width=device-width, initial-scale=1.0, maximum-scale=1.0,minimum-scale=1.0, user-scalable=0';
oMeta.name = 'viewport';
document.getElementsByTagName('head')[0].appendChild(oMeta);
document.writeln('免费领取课程');