Okay, from what you have given, I can guess that you need to get the option’s text.
function getSelectedText(elementId) {
var elt = document.getElementById(elementId);
if (elt.selectedIndex == -1)
return null;
return elt.options[elt.selectedIndex].text;
}
Use this way:
var text = getSelectedText('selectID');
Or as Derek suggested, you can have it in one line too:
var text = elementId.querySelector("option:checked").innerText
Note: This works only in modern browsers.