get aspxcombobox value using javascript

Question

I have a aspxcombobox with ID="comboSubjectCategory", can I get the selected value/text using javascript function? thanks lot...I tried this but it does not works.

function getValue() {
   var combo = document.getElementById('comboSubjectCategory').value;
   alert(combo);
}

Answer 1

The ASPxComboBox is not a simple HTML element. In the browser, it is represented by the ASPxClientComboBox Class . Use its GetValue , GetText or GetSelectedItem methods to obtain the selected value.

You can obtain the ASPxClientComboBox instance by the name assigned to the ClientInstanceName property of the ASPxComboBox control.

See Also: Client-Side Functionality

Answer 2

var combo = document.getElementById('<%= comboSubjectCategory.ClientID %>');
var val = combo.options[combo.selectedIndex].value;