"menu.json" that I'm using

{
    "images":
    {
        "title":
        {
            "image" : "custommainmenu:textures/gui/minecraft.png",
            "posX" : -130,
            "posY" : 60,
            "width" : 500,
            "height" : 500,
            "alignment" : "top_center"
        }

    },

    "buttons":
    {
        "singleplayer":
        {
            "text" : "menu.singleplayer",
            "posX" : 24,
            "posY" : -126,
            "width" : 100,
            "height" : 20,
            "texture" : "textures:button/button.png",
            "action" :
            {
                "type" : "openGui",
                "gui" : "singleplayer"
            },
            "alignment" : "bottom_left"
        },

        "multiplayer":
        {
            "text" : "menu.multiplayer",
            "posX" : 24,
            "posY" : -102,
            "width" : 100,
            "height" : 20,
            "texture" : "textures:button/button.png",
            "action" :
            {
                "type" : "openGui",
                "gui" : "multiplayer"
            },
            "alignment" : "bottom_left"
        },

        "mods":
        {
            "text" : "Mods",
            "posX" : 24,
            "posY" : -78,
            "width" : 100,
            "height" : 20,
            "texture" : "textures:button/button.png",
            "action" :
            {
                "type" : "openGui",
                "gui" : "mods"
            },
            "alignment" : "bottom_left"
        },

        "options":
        {
            "text" : "menu.options",
            "posX" : 24,
            "posY" : -54,
            "width" : 100,
            "height" : 20,
            "texture" : "textures:button/button.png",
            "action" :
            {
                "type" : "openGui",
                "gui" : "options"
            },
            "alignment" : "bottom_left"
        },

        "quit":
        {
            "text" : "menu.quit",
            "posX" : 24,
            "posY" : -30,
            "width" : 100,
            "height" : 20,
            "texture" : "textures:button/button.png",
            "action" :
            {
                "type" : "quit"
            },
            "alignment" : "bottom_left"
        },

        "language":
        {
            "text" : "",
            "posX" : 159,
            "posY" : -30,
            "width" : 20,
            "height" : 20,
            "action" :
            {
                "type" : "openGui",
                "gui" : "languages"
            },
            "alignment" : "bottom_left"
        },

        "refresh":
        {
            "text" : "",
            "posX" : 132,
            "posY" : -30,
            "width" : 20,
            "height" : 20,
            "texture" : "custommainmenu:textures/gui/buttons.png",
            "action" :
            {
                "type" : "refresh"
            },
            "alignment" : "bottom_left"
        }
    },

    "texts":
    {
        "xstreme":
        {
            "text" : "New Generation II Modpack",
            "posX" : 10,
            "posY" : 10,
            "color" : 65416,
			"hoverColor" : 65416,
            "alignment" : "medium_left"
        },
        "infomation":
        {
            "text" : "Welcome, #username#! Now it's #time#",
            "posX" : 10,
            "posY" : 20,
            "color" : 65416,
			"hoverColor" : 65416,
            "alignment" : "medium_left"
        },

        "modsloaded":
        {
            "text" : "#modsloaded# Mods Loaded",
            "posX" : -97,
            "posY" : -30,
            "color" : -1,
			"hoverColor" : -1,
            "alignment" : "bottom_right"
        },

        "modsactive":
        {
            "text" : "#modsactive# Mods Active",
            "posX" : -97,
            "posY" : -20,
            "color" : -1,
			"hoverColor" : -1,
            "alignment" : "bottom_right"
        },

        "forge":
        {
            "text" : "Forge #forgeversion#",
            "posX" : -97,
            "posY" : -40,
            "color" : -1,
			"hoverColor" : -1,
            "alignment" : "bottom_right"
        },

        "mc":
        {
            "text" : "Minecraft #mcversion#",
            "posX" : -97,
            "posY" : -50,
            "color" : -1,
			"hoverColor" : -1,
            "alignment" : "bottom_right"
        },

		"mojang":
        {
            "text" : "Copyright Mojang AB. Do not distribute!",
            "posX" : -197,
            "posY" : -10,
            "color" : -1,
            "alignment" : "bottom_right"
        }
    },

    "other":
    {
        "splash-text":
        {
            "posX" : 130,
            "posY" : 105,
            "color" : -256,
            "alignment" : "top_center",
            "file" : "texts/splashes.txt"
        },

        "background":
        {
            "image" : "",
            "mode" : "fill",
            "slideshow":
            {
                "images" : ["textures:background/IA1.jpg","textures:background/IA2.jpg"],
                "displayDuration" : 160,
                "fadeDuration" : 40
            }
        }
    }
}