// this function controls the visibility of the scroll buttons
function scrollNavi(total) {
	var div = document.getElementById('chef_product_'+1);			
	if (div.style.display == 'block'){
		document.getElementById('naviLeft').style.display = 'none';		
		document.getElementById('img_left').style.display = 'none';						
	}else{
		document.getElementById('naviLeft').style.display = 'block';				
		document.getElementById('img_left').style.display = 'block';								
	}
	
	var div = document.getElementById('chef_product_'+total);			
	if (div.style.display == 'block'){
		document.getElementById('naviRight').style.display = 'none';		
		document.getElementById('img_right').style.display = 'none';				
	}else{
		document.getElementById('naviRight').style.display = 'block';			
		document.getElementById('img_right').style.display = 'block';						
	}
}

// Scroll to the right once
function scrollLeft(total) {
	for (i = 1; i <= total; i++){
		var div = document.getElementById('chef_product_'+i);
		if(div.style.display == 'block') {
			div.style.display = 'none';
			var div = document.getElementById('chef_product_'+(i+3));			
			div.style.display = 'block';	
			break;
		}
	}
	scrollNavi(total);
}


// Scroll to the left one element
function scrollRight(total) {
	for (i = 1; i <= total; i++){	
		var div = document.getElementById('chef_product_'+i);			
		if(div.style.display == 'block') {
			var div = document.getElementById('chef_product_'+(i-1));			
			div.style.display = 'block';
			var div = document.getElementById('chef_product_'+(i+2));			
			div.style.display = 'none'; 
			break;
		}
	}
	scrollNavi(total);
}
function copyBilToShi(copy_ck){
	if (copy_ck.checked==true){
		document.getElementById('firstname_shi').value = document.getElementById('firstname').innerHTML;					
		document.getElementById('lastname_shi').value = document.getElementById('lastname').innerHTML;							
		document.getElementById('address_shi').value = document.getElementById('address').innerHTML;							
		document.getElementById('city_shi').value = document.getElementById('city').innerHTML;							
		document.getElementById('postal_shi').value = document.getElementById('postal').innerHTML;							
		document.getElementById('province_shi').value = document.getElementById('province').innerHTML;							
	}else{
		document.getElementById('firstname_shi').value = "";					
		document.getElementById('lastname_shi').value = "";						
		document.getElementById('address_shi').value = "";								
		document.getElementById('city_shi').value = "";					
		document.getElementById('postal_shi').value = "";					
		document.getElementById('province_shi').value = "";					
	}
}
function onlyNumbers(evt){
	var charCode = (evt.which) ? evt.which : evt.keyCode;
	var ret = true;
	if (charCode > 31 && (charCode < 48 || charCode > 57)){
		ret= false;
	}
	return ret;      
}