function check_source() {
	var refID = "";
	var is_q = document.URL.indexOf('?ref=');
	if (is_q != -1) 
	{
		refID = document.URL.substring(document.URL.indexOf('?ref=')+5, document.URL.length);
		if (refID == "fb") {
			alert('Spread betting carries a high risk to your capital, can be very volatile and prices may move rapidly against you. Only speculate with money you can afford to lose as you may lose more than your original deposit and be required to make further payments. Spread betting may not be suitable for all customers, so ensure you fully understand the risks involved and seek independent advice if necessary.');
		}
	}
}


//function check_source() { 
//	var sourceID = window.location.search.substring(1);
//	if(sourceID == 'fb') {
//		alert('Spread betting carries a high risk to your capital, can be very volatile and prices may move rapidly against you. Only speculate with money you can afford to lose as you may lose more than your original deposit and be required to make further payments. Spread betting may not be suitable for all customers, so ensure you fully understand the risks involved and seek independent advice if necessary.');
//	}else{return false;}
//}