<form>
用户名:
<input type="text"name="username"/>
<br/>
密码:
<input type="password"name="password">
<br/>
确认密码:
<input type="password"name="confirmpassword">
<br/><br/>
<input type="button"value="确认"onClick="checkPassword();"/>
<br/>
</form>
</div>
</body>
<script language="javascript">
function checkPassword()
{
with(document.all)
{
if(form.password.value!=form.confirmpassword.value)
{
alert("两次输入的密码不一样!");
passWord.value="";
confirmpassword.value="";
return false;
}
if(form.username.value=="")
{
alert("用户名不能为空");
form.username.focus();
return false;
}
doument.forms[0].submit();
}
}
</script>