Alert

```lua scrW,scrH = System:screenSize();

btnH = scrH / 12; print(btnH) function createButton( text, x,y,w,h, callback) local button = Button(); button:frame( x, y, w, h); button:title( "按钮 " .. text ); button:backgroundColor(0x777777,1);

button:callback( 
 function()
    if( callback ) then
        callback();
    end
end );
return button;

end

button1 = createButton("关闭1", 0, btnH*1, scrW, btnH, function() Alert("标题", "内容", "确定", function(index) print("按钮ID:",index) end ); end );

button2 = createButton("关闭2", 20, btnH*3, scrW-40, btnH, function() Alert("标题", "内容", "确定","取消", function(index) print("按钮ID:",index) end ); end );

button3 = createButton("关闭3", 0, btnH*5, scrW, btnH, function() Alert("标题", nil, "确定","取消", function(index) print("按钮ID:",index) end ); end );

button4 = createButton("关闭4", 0, btnH*7, scrW, btnH, function() Alert(nil, "内容", "确定","取消", function(index) print("按钮ID:",index) end ); end );

```lua