An javasctript problem

Hey everyone, i have got a strange problem. How i can use javascript with a combobox onchange event?
Here is a code part with combo box:

<select class="cf_inputbox validate-selection" id="select_5" size="1" title="you must select something from here"  name="select_5" onchange="getcomobo1(this);">

and getcombo1(lb) is described in javascript section as following:

function getcombo1(lb){
  var frm=document.ChronoContacts_myform;
  frm.alert("This is an alert from");
}

But when i select an combobox item, nothing happens. Why? My form trully has got a name "myform", everything should work fine, as in tutorials, but it is not.

I did some progress, but now is next question. How to change the text of cf_text field? I tierd innerHTML, but it was not working.

Hi xan917,

I would leave this unchanged so that you don't need to edit the Form HTML

<select class="cf_inputbox validate-selection" id="select_5" size="1" title="you must select something from here" >

and use this in the Form JS box

window.addEvent('domready', function() {
  var select_5 = $('select_5');
  select_5.addEvent('change', function() {
      alert('This is an alert from');
    }
  });
});

Inner HTML will work if you have the tag correctly identified.

What exacty are you trying to do here?

Bob