function validatePromoCode(){
	
	var params = new Object();
	
	params.promoCode = document.getElementById('sourceCode').value;
	
	http( 'POST' , 'validate_promo_code.cfm' , responseHandler, params); 
}

function responseHandler(obj){
	
	if(obj.responsesuccess == "false")
	{
		document.getElementById('responseMessage').innerHTML = obj.responsemessage;
		document.getElementById('sourceCode').value = "";
	}
	else
	{
		document.getElementById('promoForm').submit();
	}
	
}