<script language="javascript">

<!--

function FindChild(ID) {

  var lstChild=document.adminForm.Child;

  var i=0;

  lstChild.length=0;



if (ID==1) {

 lstChild.length=i+1;

 lstChild.options.text = 'Child 1';

 lstChild.options.value='1';

 i=i+1;



 lstChild.length=i+1;

 lstChild.options.text = 'Child 2';

 lstChild.options.value='2';

 i=i+1;

}

if (ID==2) {

 lstChild.length=i+1;

 lstChild.options.text = 'Child 3';

 lstChild.options.value='3';

 i=i+1;



 lstChild.length=i+1;

 lstChild.options.text = 'Child 3';

 lstChild.options.value='3';

 i=i+1;

}

}

//-->

</script>





<form name=adminForm>

<select name=Otrasl OnChange="FindChild(this.options[this.selectedIndex].value);"><option value=0 >Отраслевые услуги<option value=1 >Parent 1<option value=2>Parent 2</select><br><br>

<select name=Child></select>

</form>