function swapradio(on,off){
document.getElementById(on+"_img").src="images/radio-on.jpg";
document.getElementById(on).value="on";
document.getElementById(off+"_img").src="images/radio-off.jpg";
document.getElementById(off).value="off";
}
function Search_Postcode(){	
	postcode=document.storesearchform.postcode.value;
	if (postcode.length==0 || postcode==" Postcode"){
		alert("Please enter a Postcode");
		document.storesearchform.postcode.focus( );
   		return false;
	}
	result = /^\d{4}$/.test(postcode);
	if (result==false){
		alert("Postcode must be a four digit number");
		document.storesearchform.postcode.value="";
		document.storesearchform.postcode.focus( );
   		return false;
	
	}
	/*if (postcode.length!=4){
		alert("Postcode must be 4 digits long");
		document.store_seach_form.postcode.focus( );
   		return false;
	}*/	

	
	document.storesearchform.submit();
	return result;
}
function bulkOrderOptions(value){
	if (value!="" && value!=0){
		document.getElementById('bulk_options').style.display="";	
	}else{
		document.getElementById('bulk_options').style.display="none";
	}
}