Error occuring in that line no. which doesn't present in code

When i am running the javascript code that is reading excel of 237 rows so it runs well but when i am reading the excel of 999 rows with the same code so it gives error "Number expected" 开发者_开发技巧in line 272 although my code ends at line 268.Can anyone plz tell me how to fix it

Load your page in IE8 and change the options to allow debugging - this will let you jump straight to the error code.

If this is happening in ie < 9 pehaps your error is in another js file that is included in your page (ie < 9 does not tell you which file the error is in)