<!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" xml:lang="en"> <head> <meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> <title>Document</title> <style type="text/css"> .td_left{ width:150px; text-align:right; } </style> <script type="text/javascript"> function saveform(form){ var email=form.form_email.value; var password=form.form_password.value; var confirmpassword=form.form_checkpassword.value; if(email !="" && !checkemail(email)){ alert("邮箱格式错误，请重新填写"); return false; }else if(email==""){ alert("邮箱不能为空"); return false; } } var checkpasswordinfo=checkpassword(password,confirmpassword); if(checkpasswordinfo != "success"){ info.innerHTML=checkpasswordinfo; return false; } function checkemail(email){ var regu="^([\.A-Za-z0-9_-])+@([A-Za-z0-9_-])+(\.[A-Za-z0-9_-])+"; var re=new RegExp(regu); return re.test(email); } function checkpassword(password,confirmpassword){ var info="success"; if(password=="" || confirmpassword==""){ alert("密码/确认密码不能为空"); } else{ if(password != confirmpassword){ alert("密码/确认密码请保持一致"); } } } </script> </head> <body> <div> <form method="post"> <table> <tr> <td>邮箱：</td> <td><input type="email" name="form_email"/></td> </tr> <tr> <td>密码：</td> <td><input type="password" name="form_password"/></td> </tr> <tr> <td>确认密码：</td> <td><input type="password" name="form_checkpassword"/></td> </tr> <tr> <td></td> <td><input type="button" onclick="saveform(this)" value="登录"/></td> </tr> </table> </form> </div> </body></html>
1 回答
李晓健
TA贡献1036条经验 获得超461个赞
<tr> <td></td> <!--这里不能传this 这里的this指向的是按钮，不是form--> <td><input type="button" onclick="saveform()" value="登录"/></td> </tr>
function saveform(){
//这里的form 需要通过id获取 没法传进来
var form = document.getElementById('form');
var email=form.form_email.value;
var password=form.form_password.value;
var confirmpassword=form.form_checkpassword.value;
if(email !="" && !checkemail(email)){
alert("邮箱格式错误，请重新填写");
return false;
}else if(email==""){
alert("邮箱不能为空");
return false;
}
/**
* 密码验证这一块是不是也应该写在saveform里面
*/
var checkpasswordinfo=checkpassword(password,confirmpassword);
if(checkpasswordinfo != "success"){
//这个info 没有定义
// info.innerHTML=checkpasswordinfo;
return false;
}
}
function checkemail(email){
var regu="^([\.A-Za-z0-9_-])+@([A-Za-z0-9_-])+(\.[A-Za-z0-9_-])+";
var re=new RegExp(regu);
return re.test(email);
}
function checkpassword(password,confirmpassword){
var info="success";
if(password=="" || confirmpassword==""){
alert("密码/确认密码不能为空");
//这里需要更新info
info = 'error';
} else{
if(password != confirmpassword){
alert("密码/确认密码请保持一致");
//这里需要更新info
info = 'error';
}
}
// 这里需要返回info
return info;
}
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