function showText()
      {

        //This functions is used show selected value of listbox into textbox.
         var objselect;
         var txtval;
        objselect=document.forms['form1'].Departments;
 
       //Get the selected value from listbox
        txtval=objselect.options[objselect.selectedIndex].value;

<select name="Department" id="Department" onChange="showText();">
                <option value="notselected" selected>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</option>