// JavaScript Document

function profitRewards()
{
	var profitGoal = parseInt(document.getElementById('profitGoal').value);
	var previousPeriod = parseInt(document.getElementById('previousPeriod').value);
	var percentGain = parseInt(document.getElementById('percentGain').value) / 100;
	var totalParticipants = parseInt(document.getElementById('totalParticipants').value);
	var meetSalesGoal = parseInt(document.getElementById('meetSalesGoal').value) / 100;
	var error = 0;

	if( isNaN(profitGoal) )
	{
		alert("Please provide a sales or gross profit gaol.");
		document.getElementById('profitGoal').focus();
		error = 1;
	}
	else if( isNaN(previousPeriod) )
	{
		alert("Please provide the previous period actual");
		document.getElementById('previousPeriod').focus();
		error = 1;
	}
	else if( isNaN(percentGain) )
	{
		alert("Please provide the percent of gain used for rewards.");
		document.getElementById('percentGain').focus();
		error = 1;
	}
	else if( isNaN(totalParticipants) )
	{
		alert("Please provide the total number of participants");
		document.getElementById('totalParticipants').focus();
		error = 1;
	}
	else if( isNaN(meetSalesGoal) )
	{
		alert("Please provide the anticipated % of participants that will meet the sales goal.");
		document.getElementById('meetSalesGoal').focus();
		error = 1;
	}

	if( !error )
	{
		var gain = 0;
		var amountForRewards = 0;
		var netGain = 0;
		var rewardValue = 0;
		

		if( (profitGoal > 0) && (previousPeriod > 0) )
		{
			gain = (profitGoal - (previousPeriod) );
		}
		
		if( (percentGain > 0) )
		{
			amountForRewards = (gain * (percentGain) );
		}
		if( (meetSalesGoal > 0) && (totalParticipants > 0) )
		{
			rewardValue = (amountForRewards/(meetSalesGoal * totalParticipants) ) ;
		}
		
		netGain = (gain - (amountForRewards) ) ;

		document.getElementById('gain').innerHTML=gain.toFixed(0);
		document.getElementById('amountForRewards').innerHTML=amountForRewards.toFixed(0);
		document.getElementById('netGain').innerHTML=netGain.toFixed(0);
		document.getElementById('rewardValue').innerHTML=rewardValue.toFixed(0);
	}
}