function $get(el) {

	var obj = document.getElementById(el);
	if (obj) {
		return obj;		
	} else {
		return null;
	}
} 

function updateBasketQuantity(frm,s1) {
	frm = $get(frm);
	s1 = $get(s1);
	
	var s1input = document.createElement('input'); 
	s1input.setAttribute('type','hidden');
	s1input.setAttribute('name',s1.name);
	s1input.setAttribute('value',s1.value);
	frm.appendChild(s1input);
	s1.disabled='disabled';
	
	frm.submit();	
}
function confirmDeleteItem() {
	return confirm('Are you sure you wish to remove this item from your basket ?');	
}
function valNum(str) {
var test = "0123456789.";
var errors = 0;
for (var i = 0; i <= str.length -1; i++) {
   if (test.indexOf(str.charAt(i)) == -1) errors++;
}
if(!errors) {
	if(parseFloat(str) <= 0) {
		alert("Please enter a value greater than 0");
		return false;
		}
	else
		return true;
	}
else {
	alert("Please enter only numerical characters");
	return false;
	}
}