Adding to a HTML text field by clicking items in a multiple select box

Question

I\'m wondering if it is possible that when I click on an item in a multiple select box in HTML that it goes into another form box? Basically, when I click on something I want th

Answer 1

This will work, with plain javascript:

var sel = document.getElementsByName ('tags')[0];
sel.onclick = function () {
    document.getElementsByName ('taginput')[0].value = this.value;
}

Demo here

A second version avoiding duplicates:

var sel = document.getElementsByName('tags')[0];
var choosen = [];
sel.onclick = function () {
    var is_there = !!~choosen.indexOf(this.value);
    if(is_there){return false;};
    choosen.push(this.value);
    document.getElementsByName('taginput')[0].value += this.value + ' ';
}

Demo here