function InitStyle()
{
    try
    {   
        var pathStyle = "App_Themes/Styles/";
        var now = new Date();
        var actualMonth = now.getMonth();
        switch (actualMonth)
        {
            case 0:
            case 1:
            case 11:
                document.styleSheets[0].href =  pathStyle.concat("styleBlau.css");
                break;
            case 2:
            case 3:
            case 4:
                document.styleSheets[0].href =  pathStyle.concat("styleGruen.css");
                break;
            case 5:
            case 6:
            case 7:
                document.styleSheets[0].href =  pathStyle.concat("styleSommerRot.css");
                break;
            case 8:
            case 9:
            case 10:
                document.styleSheets[0].href =  pathStyle.concat("styleHerbstRot.css");
                break;
        }   
    }
    catch (ex)
    {  
    }
}