Word Finder
function set_matching_words(selectObj, txtObj) {
var letter = txtObj.value;
for(var i = 0; i < selectObj.length; i++) {
if(selectObj.options[i].value.charAt(0) == letter) {
selectObj.options[i].selected = true;
} else {
selectObj.options[i].selected = false;
}
}
}
Download the code here: javascript-form-field-example-3.zip