本文主要和大家分享js如何判断邮箱格式是否正确，本文主要以代码的形式和大家分享，希望能帮助到大家。<form action="#"onsubmit="return validate_form(this);" method="post"> Email: <input type="text" name="email" size="30">
<input type="submit" value="Submit">
</form>
<script type="text/javascript"> function validate_required(field,alerttxt)
{ with (field)
{ if (value==null||value=="")
{alert(alerttxt);return false} else {return true}
}
} function validate_email(field,alerttxt)
{ with (field)
{ apos=value.indexOf("@") dotpos=value.lastIndexOf(".") if (apos<1||dotpos-apos<2)
{alert(alerttxt);return false} else {return true}
}
} function validate_form(thisform)
{ with (thisform)
{ if (validate_required(email,"请填入内容!")==false)
{email.focus();return false} if (validate_email(email,"请填写正确的邮箱格式!")==false)
{email.focus();return false}
}
}
</script>