1. Select the desired area.
2. Choose Save as web page from File menu.
3.a. Choose Selection.
Pay attention that Excel give the default name file.htm and you have to write the more suitable file name (without the extension .htm)
3.b. Choose Entire Workbook
In case you have several worksheets it will be created a more complex page (In Search by : SuperCrystal number menu all SC is saved that way). The only inconvenience is that everytime somebody open the page it shows the upper left side of first worksheet.
4. Choose the directory and click Save to save the file.