点一次添加一条记录在页面

function addCourse(){
	var insertHtml=‘<div class="course-number"><div class="mui-clearfix triangle-gray"><input type="text" readonly="readonly" 
value="9:00" class="subject-input mui-pull-left pub-font-333 mui-text-center" /><input type="text" readonly="readonly" value="11:00"
 class="subject-input pub-font-333 mui-text-center mui-pull-right"/></div><p class="course-number-title mui-text-center pub-font-333 pub-font-16">
课程节数</p><div class="mui-clearfix course-sub-number"><input type="text" value="2" class="number-input pub-font-999 mui-text-center mui-pull-left"
 disabled="disabled"/><span class="remove-course-number mui-pull-right">删除该时段</span></div></div>‘;
	var courseNumberBox=document.getElementsByClassName(‘course-number-box‘)[0];
	courseNumberBox.innerHTML+=insertHtml;
}