langsung aja ane punya 2 form , input text & select form

prodi: --> (input text)
program_diploma:ti,si,akun (select form)

jadi pas nilai prodi berubah atau diisi,
ane mau update value & label program_diploma = value prodi ane
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v

prodi: ti (input text)
program_diploma:ti (select form) --> option value=ti label=ti

mohon bantuannya mastah2?

ini js ane gan

<pre>

<script type=”text/javascript“>

function addText() {

 var x = document.getElementById("prodi");

 var y = document.getElementById("cmb");

 getProdi = x.value;

 y.value = getProdi;

 y.label = y.value;

}



</script>

<br /></pre>

ini formnya

<input id="prodi" name="" value=""/>

<select name="prodi" id="cmb">