Coming back to above. In your solution you set the jqxDropDownList’s height to 5% and #subtabs’ height to 95%. However having the jqxDropDownList’s height set to a percentage is problematic as the requesting screen might be very small or large which is both are problematic examples. Is there a way to have the jqxDropDownList’s height set to a fixed value (or a value based on context if there are several controls) and then the #subtabs’ height to fill the rest of the screen?