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登陆与注册-js代码

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>无标题文档</title><script type="text/javascript">function check(flag){    var name2=document.formname.name1;    var password2=document.formname.password1;    if(name2.value==""){        alert("用户名不能为空");        name2.focus();        return false;    }    if(password2.value==""){        alert("密码不能为空")        password2.focus();        return false;    }    if(flag==1){        document.formname.action="5秒后跳转.html";    }else if(flag==2){    document.formname.action="123.jsp";    }    document.formname.submit();}</script></head><body><form  name="formname" method="post" ">用户名:<input type="text" name="name1"  /><br />密码:<input type="password" name="password1"  /><br /><input type="button"  value="登陆"  onclick="check(1)"/><input type="button" value="注册"  onclick="check(2)" /></form></body></html>