javascript quick way to set selected option in dropdown code example
Example 1: make select option selected javascript
document.getElementById('personlist').getElementsByTagName('option')[11].selected = 'selected'
Example 2: javascript set html select value
// Get the html select element
var select = document.getElementById('<your select element id>');
// If you have a <option> like this:
// <option value="1">My Value Display text</option>
//Then your selected value of your select would be:
select.value = "1";