Calling multiple JavaScript functions on a button click

Question

How to call multiple functions on button click event?

Here is my button,

Answer 1

btnSAVE.Attributes.Add("OnClick", "var b = DropDownValidate('" + drp_compcode.ClientID + "') ;if (b) b=DropDownValidate('" + drp_divcode.ClientID + "');return b");