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i need to build a calculator. The input is a textarea and the behavior is a little complex, it should be like on this video http://www.youtube.com/watch?v=tR5tyhPmawE , 0:00 - 0:30 part. But im a little confuse where to start, im building basic interface and input. Can you point me in the right directions, im just dont know how to manage multilines wise. Thank you.
Here’s something that will help you get started.
I quickly wrapped up a sample demo @ http://jsfiddle.net/3tCep/
you can view the source here: https://github.com/davidnorth/JsReckoner