1 type=text
<input type="text" name="yourname" size="30" maxlength="20" value="输入框的长度为30,允许最大字符数为20"><br>
2 type=password<form action="">
密码:<input type="password" name="yourpwd" size="20" maxlength="15" value="123456">密码长度小于15
</form>
3 type=file <form action="">
文件:<input type="file" name="yourfile" size="30">
</form>
4 type=checkbox<form name="form1">
a:<input type="checkbox" name="checkit" value="a" checked><br>
b:<input type="checkbox" name="checkit" value="b"><br>
c:<input type="checkbox" name="checkit" value="c"><br>
</form>
5 type=radio<form name="form1">
a:<input type="radio" name="checkit" value="a" checked><br>
6 type=image
<form action="">
<input type="image" src="https://ss0.baidu.com/73t1bjeh1BF3odCf/it/u=3466314416,2888444446&fm=73">
</form>
7 type=submit and type=reset<form name="form1" action="xxx.asp">
<input type="text" name="yourname">
<input type="submit" value="提交">
<input type="reset" value="重置">
</form>