function passPromotionalCodeCheck(){
	var passCheck = true;
	var code = document.getElementById( "promotionalCode" ).value;
	
	//set default
	document.getElementById( "promotionalCodeErrorMsg" ).style.display = "none";
	
	if ( code !="" ){
		var validChars = "0123456789";
		
		if ( code.length < 4 ){
			passCheck = false;
		}
		for ( i = 0; i < code.length && passCheck == true; i++){
			aChar = code.charAt(i);
			if ( validChars.indexOf( aChar ) == -1){
				passCheck = false;
			}
		}
	}
	
	return passCheck;
}

function getPromotionUrlProperty(){
	var promotionUrlProperty = "";
	var code = document.getElementById( "promotionalCode" ).value;
	
	if( code != "" ){
		promotionUrlProperty = "&DCSext.pr_cd=" + code;
	}
	return promotionUrlProperty;
}