点击“输入”不会在IE8中发布表单

Question

I'm using PHP to pass a login form when required, and here is the code:

$htmlForm = '<form id="frmlogin">'.'<label>';
switch(LOGIN_METHOD)
{
    case 'both':
        $htmlForm .= $ACL_LANG['USERNAME'].'/'.$ACL_LANG['EMAIL'];
        break;
    case 'email':
        $htmlForm .= $ACL_LANG['EMAIL'];
        break;
    default:
        $htmlForm .= $ACL_LANG['USERNAME'];
        break;
}                       

$htmlForm .= ':</label>'.
             '<input type="text" name="u" id="u" class="textfield" />'.
             '<label>'.$ACL_LANG['PASSWORD'].'</label>'.
             '<input type="password" name="p" id="p" class="textfield" />'.
             '<center><input type="submit" name="btn" id="btn" class="buttonfield" value="Sign in to extranet" /></center>'.
             '</form>';

return $htmlForm;

The problem is, is that when the user hits enter in IE8, the form does not submit, and the user is forced to hit the submit button.

How do I rectify this?

Answer 1

If this is a real problem and you can't find another solution you can always do an onkeypress event for the form and check if the <kbd>Enter</kbd> key was pressed.

EDIT: Here's the correct code according to Machine's answer:

$htmlForm .= ':<form><label>'.$ACL_LANG['USERNAME'].'</label>'.
                                     '<input type="text" name="u" id="u" class="textfield" />'.
                                     '<label>'.$ACL_LANG['PASSWORD'].'</label>'.
                                     '<input type="password" name="p" id="p" class="textfield" />'.
                                     '<center><input type="submit" name="btn" id="btn" class="buttonfield" value="Sign in to extranet" /></center>'.
                                     '</form>';

EDIT 2: Your HTML is valid. Try this:

function checkEnter(e) { //e is event object passed from function invocation
    var characterCode //literal character code will be stored in this variable

    if (e && e.which) { //if which property of event object is supported (NN4)
        e = e
        characterCode = e.which //character code is contained in NN4's which property
    }
    else {
        e = event
        characterCode = e.keyCode //character code is contained in IE's keyCode property
    }

    if (characterCode == 13) { //if generated character code is equal to ascii 13 (if enter key)
        document.forms[0].submit() //submit the form
        return false
    }
    else {
        return true
    }
}