1.下拉列表
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Schwinn</title>
</head>
<select >
<option >kobe</option>
<option >godamn</option>
<option >genji</option>
</select>
</html>
2.设置高度
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Schwinn</title>
</head>
<!-- 设置高度size为2 -->
<select size="2">
<option >kobe</option>
<option >godamn</option>
<option >genji</option>
</select>
</html>
3.设置可以多选
使用ctrl或者shift进行多选
<select size="3" multiple="multiple">
<option >苍老师</option>
<option >高树玛利亚</option>
<option >遥美</option>
</select>
4.默认选中
selected=“selected”
<select size="3" multiple="multiple">
<option >苍老师</option>
<option selected="selected">高树玛利亚</option>
<option selected="selected">遥美</option>
</select>