javasript to jquery

I was using javasript before for emicalculator but now i need to convert that in jquery i am not getting what should be use in jquery on the following place.

Code:

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var j = document.forms[0].emi.selectedIndex;

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Because it is giving me error.


Integerz
http://www.integerz.com/

jQuery("form:first select[name=emi] option:selected").attr("value");

That should return the value of the selected option.

jQuery("form:first select[name=emi] option:selected").get(0).selectedIndex;

Should get you the selected index.