beforeLoad() is a special function that allows you to run JavaScript code before a Genie screen is rendered. This is useful, for example, to adjust the X/Y multipliers based on the display size. If defined, it will be called before every Genie screen is rendered.
Example:
function beforeLoad() {
if (pui.genie.displaySize == 132) {
pui.multX = 6;
pui.multY = 20;
}
else {
pui.multX = 8;
pui.multY = 23;
}
}