I want to get value into text field from database when the value is selected from combo box

p.s: the value in combo box and the value I want into text field come from same table in database

• php
• javascript
• html
• combobox

if the value in the select box is the same as the value you want in the text field, you can do this with jQuery:

$("select").on('change',function(){
    $("input").val($("select option:selected").val());
});​

just replace select and input with selectors for those fields, and it's all handled client-side, here's a demo: http://jsfiddle.net/JKirchartz/JwjX3/

my friend said that:

$('select').change(function(){
            var t = $('select').val();
            $('input').val(t);            
          });