How to parse formula of html table cell to acting like excel, using javascript

[mupsheple]

I am looking for a way to make html table acting like excel using javascript(Jquery preferred). Here are my problem. I made a table like this:\[code\] <table> <tr> <td id="A1">10</td> <td id="B1">10.5</td> </tr> <tr> <td id="A2">5</td> <td id="B2" formula="A1+B1+A2"></td> </tr> </table>\[/code\]Every td has an id, some of those tds are added a formula attribute. And I wanna to calculate those formula