Expotring excel to HTML Format ?

Question

Hii
i have a problem displaying an excel file with the same format as it is on microsoft excel..(Merged Cells,Backcolors,etc...)
First i read the file and return the results on a data table...but it doesn't hold the same format as it is on excel is there a way to display it in HTML format without using the excel library as it will be on a website so the user doesn't have to have an installed version of microsoft office????
any help would be great
Thankssssssssss