html select value with getelementbyid code example
Example 1: javascript to get value of dropdown
var e = document.getElementById("elementId");
var value = e.options[e.selectedIndex].value;
var text = e.options[e.selectedIndex].text;
Example 2: use js to get select value
// reference to 'scripts' select list
// used throughout the examples below
var sel = document.getElementById('scripts');
// display value property of select list (from selected option)
console.log( sel.value );