var paths = new Array();
var currentDivNumber = 0;

function moveForward(nameOfNextDiv) {
    //Make some logic to determine what step you are on -
    //If you are not on your latest step -
    paths.push(nameOfNextDiv);
    currentDivNumber++;
    //Your div showing code here ... something LIKE:
    $(nameOfNextDiv).show();
}

function moveBackward() {
    currentDivNumber--;
    //Show the div of the currentDivNumber in the array.
    $(paths[currentDivNumber]).show();
}