Okie, i will help you.
At first, Open your /ja-transmenu/ja-transmenu.js file
Findline: (default in line 48)
TransMenu.slideTime = 400; // number of milliseconds it takes to open and close a menu
Replace with:
TransMenu.slideUpTime = 50; // number of milliseconds it takes to open a menu
TransMenu.slideDownTime = 1000; // number of milliseconds it takes to close a menu
Findline:
a = new Accelimation(x0, x1, TransMenu.slideTime, slideAccel);
Replace with:
// mod to have different slice speed between up and down.
if (x0 > x1) {
a = new Accelimation(x0, x1, TransMenu.slideDownTime, slideAccel);
}
else {
a = new Accelimation(x0, x1, TransMenu.slideUpTime, slideAccel);
}
// end mod