dhtmlxgrid multiselect with singleclick instead of ctrl/shif

Hi,
I am using dhtmlx 3.6 version library. how can i customize Grid in Multi-Select mode(enableMultiselect(true)) so that multi-select would work in single click also instead of or in addition to Ctrl/Shift key press. Please let me know Thanks in advance

The solution from the following post:
viewtopic.php?f=2&t=1019
still work well.