如何在单击按钮时在xls中打开html表

I am trying to open html table in xls on click of a button. I already have a way (using javascript) to export the html table in xls through "save as". Here I have to save the resulting xls file and then I can open it. Now I want to improve it so on click of button from html page, the html table should be opened in xls without need for "save as".I am trying to open html table in xls on click