// JavaScript Document
function nbInitVars() {

	nbPosition = new Array (0,0,0,0);

	nbSpeed = new Array (0,0,0,0);

	nbAccel = new Array (0,0,0,0);

	nbHidden = new Array (true,true,true,true);

	nbOpen = new Array (false,false,false,false);

	nbTimeout = new Array (0,0,0,0)

}

function nbTrace() {

	for (i=0; i<4; i++) {

		if ((!nbHidden[i]) && (!nbOpen[i])) {

			nbSpeed[i] += nbAccel[i];

			nbPosition[i] += nbSpeed[i];

			if (nbPosition[i] > 88) {

				nbOpen[i] = true;

				nbTimeout[i] = 125;

				nbSpeed[i] = 0;

				nbAccel[i] = 0;

				nbPosition[i] = 89

			};

			if (nbPosition[i] < 1) {

				nbHidden[i] = true;

				nbSpeed[i] = 0;

				nbAccel[i] = 0;

				nbPosition[i] = 0;

				document.getElementById("nb_item_" + (i + 1)).style.display = "none"

			};

			document.getElementById("nb_item_" + (i + 1)).style.top = nbPosition[i] - 59

		};

		if (nbOpen[i]) {

			nbTimeout[i]--;

			if (nbTimeout[i] == 0) {

				nbOpen[i] = false;

				nbAccel[i] = -2

			}

		}

	};

	setTimeout("nbTrace()",10)

}

function nbInit() {

	document.getElementById('nbFlash').style.visibility = 'visible';

	nbInitVars();

	nbTrace();

}

function nbOpenItem(idNum) {

	for (i=0; i<4; i++) {

		if (!nbHidden[i]) {

			nbAccel[i] = -2;

			nbOpen[i] = false

		}

	};

	nbAccel[idNum-1] = 2;

	nbHidden[idNum-1] = false;

	document.getElementById("nb_item_" + idNum).style.display = "block"

}