shake with javascript and phonegap via Nathan Freitas on the PHoneGap liist

var kAccelerometerFrequency =  25; //Hz
var kFilteringFactor = 0.1;
var kEraseAccelerationThreshold = 2.0;
var kMinEraseInterval = 0.5;

var lastTime = new Date().getTime();
var myAccelerometer = new Array(3);
myAccelerometer[0] = 0;
myAccelerometer[1] = 0;
myAccelerometer[2] = 0;

function gotAcceleration(x,y,z){

    //Use a basic high-pass filter to remove the influence of the gravity
    myAccelerometer[0] = x * kFilteringFactor + myAccelerometer[0] * (1.0 - kFilteringFactor);
    myAccelerometer[1] = y * kFilteringFactor + myAccelerometer[1] * (1.0 - kFilteringFactor);
    myAccelerometer[2] = z * kFilteringFactor + myAccelerometer[2] * (1.0 - kFilteringFactor);
   
    // Compute values for the three axes of the acceleromater
    var nx = x - myAccelerometer[0];
    var ny = y - myAccelerometer[1];
    var nz = z - myAccelerometer[2];
   
    //Compute the intensity of the current acceleration
    var length = Math.sqrt(nx * nx + ny * ny + nz * nz);
   
    // If above a given threshold, then its a go!
    if((length >= kEraseAccelerationThreshold) && (new Date().getTime() > lastTime + kMinEraseInterval)) {
        
       ///call your code or function here to handle the shake

    }
   
    return x + " " + y + " " + z;
}