function increment(speed) {
	value = document.jackpot.amount.value.substring(1);
	minincrement = 2;
	maxincrement = 4;
	increment_value = (Math.round(Math.random()*(maxincrement-minincrement)))+minincrement;
	increment_value = ".0"+increment_value;

	updatedvalue = parseFloat(value)+parseFloat(increment_value);
	updatedvalue = "$"+updatedvalue;
	var dotPos = updatedvalue.indexOf('.');
	if (dotPos> 0) {
		updatedvalue +='00';
		updatedvalue = updatedvalue.substring(0,dotPos +=3);
	} 
	else updatedvalue = updatedvalue + '.00';
	document.jackpot.amount.value=updatedvalue;


	switch (speed) {
		case 0:
			mininterval = 500;
			maxinterval = 700;
			break;
		case 1:
			mininterval = 1000;
			maxinterval = 1400;
			break;
		case 2:
			mininterval = 2000;
			maxinterval = 2800;
			break;
		default:
			mininterval = 2500;
			maxinterval = 2500;
			break;
	}
	setTimeout("increment("+speed+")", (Math.round(Math.random()*(maxinterval-mininterval)))+mininterval);
}