Combo box ( i can't solved. help me)

hi, i have doubt in combo box
<select name="branch">
<option>chennai</option>
<option>bangalore</option>
<option>delhi</option>
<option>mumbai</option>
</select>
In the above code i didn't use <option value> but i give the values between the <option>xxxx</option>tags.
Now i want to retreive the values between the <option></option> tags.
is it possible?.if yes how?. please send me code. it would be very helpful to me.

linta mam..try this..
I hope u know how to write js functions..
write a function for onChange event of ur select ..
inside the function u can give
var index=document.getElementById("branch").selectedIndex;
alert(document.getElementById("branch").options[index].text)

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