常用事件

[html]代码库

方法一：
< script LANGUAGE=" JavaScript ">
    function checkvalue() { if (document.welcomeform.nickname.value == ""
    ) { alert( " 昵称不能为空！ " ); return ( false ); } if (document.welcomeform.password.value
    == "" ) { alert( " 密码不能为空！ " ); return ( false ); } document.welcomeform.submit();
    return ( true ); }
</ script>
< body>
    < form name=" welcomeform " method=" post " action=" welcome.asp ">
        < a href=" # " onclick=" javascript:checkvalue();return false: ">
            登录
        </ a>
    </ form>
</ body>


方法二：
<form name="welcomeform" method="post" action="welcome.asp"> 
<input type=text> 
</form> 
<a href="javascript:welcomeform.submit();">提交</a>