Hello Artem..

Thank You for the reply..
When I first visit the site, here is the screenshot. The first tab is “Furniture”. The buttons show correctly. Even the variable products show their variation options. http://prntscr.com/j7g7ns
But, when I swap to next tab, for example “Pakaian”, here is the screenshot http://prntscr.com/j7g82z . Not all of the buttons show. I think two buttons are missing. They are button from YITH premium best price guaranteed plugin and button from YITH premium request to quote plugin.
And, when I swap back to the first tab, “Furniture”, all the buttons are shown correctly. But, the variation options are missing. Here is the screenshot http://prntscr.com/j7gaf3. So, I can not chose any option from the variation options.

That is my problem. Also, I want to let You that all the previous problems that is caused by the plugins are fixed now. Thank You very much for Your patience. I really appreciate it very much.

Best regards..