function convert_promoCode(type, code) {
	if(type == "alpha") {
		switch(code) {
			case 10 : result = "AX";
					  break;
			case 15 : result = "AE";
					  break;
			case 20 : result = "BX";
					  break;
			case 25 : result = "BE";
					  break;
			case 30 : result = "CX";
					  break;
			case 35 : result = "CE";
					  break;
			case 40 : result = "DX";
					  break;
			case 45 : result = "DE";
					  break;
			case 50 : result = "EX";
					  break;
			default : result = "";
			          break;
		}
	}
	else {
		switch(code) {
			case "AX" : result = "10";
					  break;
			case "AE" : result = "15";
					  break;
			case "BX" : result = "20";
					  break;
			case "BE" : result = "25";
					  break;
			case "CX" : result = "30";
					  break;
			case "CE" : result = "35";
					  break;
			case "DX" : result = "40";
					  break;
			case "DE" : result = "45";
					  break;
			case "EX" : result = "50";
					  break;
			default   : result = "0";
			          break;
		}
	}
return result;
}	

function generate_promoCode(discount) {

	alpCode  = array("A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z");
	numCode1 = Math.random() * 25;
	numCode2 = Math.random() * 25;
	
	sCode = alpCode[numCode1];
	eCode = alpCode[numCode2];
	
	result = sCode+discount+eCode;

return result;
}

function compute_promoCode(discount, amount) {

	result = Math.abs((amount * discount) / 100);
	result = Math.abs(amount - result);
	
return result;
}