function compute(form)
{
var rake= new Array(30);
 	
rake[0]=0.05;
rake[1]=0.08;
rake[2]=0.12;
rake[3]=0.16;
rake[4]=0.23;
rake[5]=0.26;
rake[6]=0.28;
rake[7]=0.31;
rake[8]=0.04;
rake[9]=0.06;
rake[10]=0.08;
rake[11]=0.13;
rake[12]=0.18;
rake[13]=0.22;
rake[14]=0.26;
rake[15]=0.06;
rake[16]=0.09;
rake[17]=0.13;
rake[18]=0.17;
rake[19]=0.24;
rake[20]=0.27;
rake[21]=0.29;
rake[22]=0.32;
rake[23]=0.05;
rake[24]=0.07;
rake[25]=0.09;
rake[26]=0.14;
rake[27]=0.19;
rake[28]=0.23;
rake[29]=0.27;

rakepermin = rake[form.limit.value];
minutes = form.hours.value * 60 / 7;
rakepercent = form.percent.value / 100;

for( i = 0; i < form.tables.length; i++ )
{
	if( form.tables[i].checked == true )
	tables = form.tables[i].value;
}

daily = Math.round(rakepermin * tables * minutes);
weekly = daily * 7;
monthly = Math.round(daily * 30.5);
yearly = monthly * 12;

document.getElementById("totalDaily").innerHTML = "$" + daily;
document.getElementById("totalWeekly").innerHTML = '$' + weekly;
document.getElementById("totalMonthly").innerHTML = '$' + monthly;
document.getElementById("totalYearly").innerHTML = '$' + yearly;

document.getElementById("rakebackDaily").innerHTML = "$" + Math.round(daily * rakepercent);
document.getElementById("rakebackWeekly").innerHTML = '$' + Math.round(weekly * rakepercent);
document.getElementById("rakebackMonthly").innerHTML = '$' + Math.round(monthly * rakepercent);
document.getElementById("rakebackYearly").innerHTML = '$' + Math.round(yearly * rakepercent);
}