jQuery.fn.center = function () {
    this.css("position","absolute");
    this.css("top", ( $(window).height() - this.height() ) / 2+$(window).scrollTop() + "px");
    this.css("left", ( $(window).width() - this.width() ) / 2+$(window).scrollLeft() + "px");
    return this;
}
        function hideAll()
        {
            hideFranc();
            hideRH();
			hideQO();
        }
        function showFranc(){
            hideAll();
            $("#screen").css({"display": "block","opacity": "0.7", "width":$(document).width(),"height":$(document).height()});
            //$("body").css({"overflow":"hidden"});
            $(".md-franquicias").css({"display":"block"});
            $(".md-franquicias").center();  
        }
        function hideFranc(){
            $("#screen").css({"display": "none"})
            //$("body").css({"overflow":"visible"});
            $(".md-franquicias").fadeOut(); 
        }
        function showRH(){
            hideAll();
            $("#screen").css({"display": "block","opacity": "0.7", "width":$(document).width(),"height":$(document).height()});
            //$("body").css({"overflow":"hidden"});
            $(".md-rrhh").css({"display":"block"});
            $(".md-rrhh").center();  
        }
        function hideRH(){
            $("#screen").css({"display": "none"})
            //$("body").css({"overflow":"visible"});
            $(".md-rrhh").fadeOut(); 
        }
		function showQO(){
            hideAll();
            $("#screen").css({"display": "block","opacity": "0.7", "width":$(document).width(),"height":$(document).height()});
            //$("body").css({"overflow":"hidden"});
            $(".md-quejas").css({"display":"block"});
            $(".md-quejas").center();  
        }
        function hideQO(){
            $("#screen").css({"display": "none"})
            //$("body").css({"overflow":"visible"});
            $(".md-quejas").fadeOut(); 
        }