ecart multiple add works well but also adds all items if no items are selected

Hi,
I have implemented multiple add to cart interface using tutorial and all seems to work well. Client has pointed out that if nothing is selected and add to cart button is clicked, cart goes ahead and adds all items in list. Otherwise if you click one or a few items it adds those selected. I suspect there is a modification required to the DataAssist Search (rsAddSelected) behaviour but can't work it out. Can you please help?

please refer to code attached

You did not set the default where clause in Data Assist Search. Edit the Data Assist Search server beahvior and set the default Where clause to 0 = 1

for reference:
http://www.webassist.com/tutorials/Checkbox-method-for-add-to-cart

Step 2: Configure the DataAssist Search
. . .
3. For the Default WHERE clause - make sure you enter 0=1
. . .