<!DOCTYPE html>
<html>
<body>
<p id="demo">This is a paragraph.</p>
<select onchange="myFunction(this);" size="13">
<option>Georgia</option>
<option>Palatino Linotype</option>
<option>Book Antiqua</option>
<option>Times New Roman</option>
<option>Arial</option>
<option>Helvetica</option>
<option>Arial Black</option>
<option>Impact</option>
<option>Lucida Sans Unicode</option>
<option>Tahoma</option>
<option>Verdana</option>
<option>Courier New</option>
<option>Lucida Console</option>
</select>
<script>
function myFunction(selectTag) {
var listValue = selectTag.options[selectTag.selectedIndex].text;
document.getElementById("demo").style.fontFamily = listValue;
}
</script>
</body>
</html>