function hidePopup() {
  if (document.getElementById) { // DOM3 = IE5, NS6
     document.getElementById('popup').style.visibility = 'hidden';
  } else {
     if (document.layers) { // Netscape 4
        document.popup.visibility = 'hidden';
     } else { // IE 4
        document.all.popup.style.visibility = 'hidden';
     }
  }
}

function showPopup() {
  if (document.getElementById) { // DOM3 = IE5, NS6
     document.getElementById('popup').style.visibility = 'visible';
  } else {
     if (document.layers) { // Netscape 4
        document.popup.visibility = 'visible';
     } else { // IE 4
        document.all.popup.style.visibility = 'visible';
     }
  }
}

document.write('<div id="popup" style="visibility:hidden; position:absolute; width:100%; height:100%; top:0; left:0; z-index:99999;">');
document.write('<div id="fade" style="background:#000; position:fixed; width:100%; height:100%; filter:alpha(opacity=80); opacity:.80;-ms-filter:progid:DXImageTransform.Microsoft.Alpha(Opacity=80); left:0; top:0; "></div>');
document.write('<div id="popup_box" style="background:#ddd; padding:18px; position:absolute; z-index:300; top:40%; left:40%; border:2px solid #000; text-align:center; color:#000000;">');
document.write('Choose your language:');
document.write('<form name=frmlang method=post action="/wp-php/language.php">');
document.write('<select name="lang">');
document.write('<option>English</option>');
document.write('<option>Malay</option>');
document.write('</select>');
document.write('<input type=submit name="submit_lang" value=Submit>');
document.write('</form>');
document.write('</div>');
document.write('</div>');
document.write('</div>');

showPopup();