function checkNumber(tmpStr)
{
    var i = 0;
    for (i = 0; i < tmpStr.length; ++i)
	if (!((tmpStr.charAt(i) >= "0" && tmpStr.charAt(i) <= "9")

)) return true;
    return false;
}
function Clear()
{
	if(confirm("Are you sure to clear the cart?"))
	{
		obj.action="view_cart.php?opt=clear";
		obj.submit();
	}
}
function Update_Cart()
{
	for(i=0;i< obj.elements.length-1; i++)
	{
		if(obj.elements[i].type == "text" && obj.elements[i].name != "txtSearch" && obj.elements[i].name != "captcha1")
		{
			if(obj.elements[i].value == 0)
			{
				alert("Please Enter Proper Value.");
				obj.elements[i].focus();
				obj.elements[i].select();
				return;
			}
			if(checkNumber(obj.elements[i].value))
			{
				alert("Please Enter Proper Value.");
				obj.elements[i].focus();
				obj.elements[i].select();
				return;
			}
		}
	}
	obj.action = 'view_cart.php?opt=update';
	obj.submit();
}
function Check_Out()
{
	obj.action="checkout.php";
	obj.submit();
}
function remove(cat_no)
{
	if(confirm("Are you sure to delete?"))
	{
		self.location='view_cart.php?catalog_no='+cat_no;
	}
}