function calculate(){
	if ( document.getElementById('q2').value != 0 )
	{
		var weekly = document.getElementById('q1').value*
		document.getElementById('q2').value*
		document.getElementById('q3').value;

		var monthly = weekly*52/12;
		var yearly = monthly*12;
		document.getElementById('weekly').innerHTML = "$"+parseInt(weekly);
		document.getElementById('monthly').innerHTML ="$"+parseInt(monthly);
		document.getElementById('yearly').innerHTML ="$"+parseInt(yearly);
	}
}