/*
 * 检测浏览器是否支持cookie
 */
function isSupportCookie() {
	$.cookie("comlook", "10101010", {expires:365});
	if ($.cookie("comlook").indexOf("10101010") == -1) {
		alert("对不起，您的浏览器不支持Cookie。请开启后在购买。");
		return false;
	}else{
	  return true;
	}
}

function forward(book_id){
  _href('/book/details.do?bookId='+book_id);
}

/*
 * 添加购物车，传入购买数量
 */
function addToCart(book_id,qty){
  var req_url = "/add_cookie_value.do?rd="+Math.random();
  jQuery.get(req_url,{book_id:book_id,qty:qty},function(rtn){
    if(rtn=="success"){
      alert("已加入购物车！");
      _href('/book/cart.do');
    }
  });
}
/*
 * 添加购物车，不需要购买数量
 */
function addCart(book_id){
  var qty = $("#p"+book_id).val()*1;
  if(!VerifyInteger(qty)||qty==0){
    alert("温馨提示：\r\n购买数量请填写大于等于1的整数。");
    $("#p"+book_id).val("1");
    return false;
  } 
  
  var req_url = "/add_cookie_value.do?rd="+Math.random();
  jQuery.get(req_url,{book_id:book_id,qty:qty},function(rtn){
    if(rtn=="success"){
      alert("已加入购物车！");
      _href('/book/cart.do');
    }
  });
}
/*
 * 修改购物车信息
 */
function editCart(book_id){
  var qty = $("#p"+book_id).val()*1;
  if(!VerifyInteger(qty)||qty==0){
    alert("温馨提示：\r\n购买数量请填写大于等于1的整数。");
    $("#p"+book_id).val("1");
    return false;
  } 
  
  var req_url = "/update_cookie_value.do?rd="+Math.random();
  jQuery.get(req_url,{book_id:book_id,qty:qty},function(rtn){
    if(rtn=="success"){
      alert("购物车已更新！");
      _href('/book/cart.do');
    }
  });
}
/*
 * 删除购物车信息
 */
function deleteCart(book_id){
  if(confirm("确认删除该图书吗？")){
    var req_url = "/del_cookie_value.do?rd="+Math.random();
    jQuery.get(req_url,{book_id:book_id},function(rtn){
      if(rtn=="success"){
        alert("购物车已更新！");
        _href('/book/cart.do');
      }
    });
  }else{
    return false;
  }
}

/*
 * 整数验证
 */
function VerifyInteger(s){
	var pattern = /^[-\+]?\d+$/;
	if(pattern.test(s)){
		return true;	
	}
	return false;
}

function clearCart(){
  if(confirm('确定清空购物车吗？')){
    $.cookie("wpcbj",'',{ expires: -1 });
    _href('/book/cart.do');
  }else{
    
  }
}