// JavaScript Document

function calcNumPackages(packageWeightTotal){
	
	if(packageWeightTotal == 0)
	    numPackages = 0;
	if(0 < packageWeightTotal && packageWeightTotal <= 40)
    	numPackages = 1;
    if(40 < packageWeightTotal && packageWeightTotal <= 80)
        numPackages = 2;
    if(80 < packageWeightTotal && packageWeightTotal <= 120)
        numPackages = 3;
    if(120 < packageWeightTotal && packageWeightTotal <= 160)
        numPackages = 4;
    if(160 < packageWeightTotal && packageWeightTotal <= 200)
        numPackages = 5;
    if(200 < packageWeightTotal && packageWeightTotal <= 240)
        numPackages = 6;
    if(240 < packageWeightTotal && packageWeightTotal <= 280)
        numPackages = 7;
    if(280 < packageWeightTotal && packageWeightTotal <= 320)
        numPackages = 8;
    if(320 < packageWeightTotal && packageWeightTotal <= 360)
        numPackages = 9;
    if(360 < packageWeightTotal)
        numPackages = 10;

	return numPackages;
}