issue with calculation using jquery for multiple input

[puvi]

hi frens..

i ll simplify my requirement and explain the issue..

lets say, i have 3 textbox rate, quantity, total and a "add row" button. I must be able to add any no. of rows. There must also be a supertotal field before the "add row" button to display the total of totals. after entering rate and quantity, the total and supertotal should get calculated automatically without refresh.

I am able to add rows successfuly, but total is getting calculated for only 1st row..
here is the code

$(document).ready(function()
{
	$("#rate").change(function()
	{
 
		var rate, qty, total;
		rate = parseFloat($("#rate").val());
		qty = parseFloat($("#quantity").val());
		total = qty*rate;
		if(!isNaN(total))
		{
			$("#total").val(total.toFixed(2));
		}
		else
		{
			$("#total").val("There was a error");
		}
	});
});

how can i get this thing to work for all rows and also calculate the supertotal?
plss help me out with this..

thanks

[puvi]

ppl, i found the solution here

http://stackoverflow.com/questions/2581230/jquery-performing-calculation-on-dynamically-generated-elements