Required library edition:
Required library file: dhtmlxmenu_ext.js

sets the area in which the menu can appear, if the area is not set, the menu will occupy all available visible space

• x1, x2 - int, leftmost and rightmost coordinates by x axis
• y1, y2 - int, topmost and bottommost coordinates by y axis

    menu.setVisibleArea(x1, x2, y1, y2);