$(document).ready(function(){
    $("#id_concept_content4").hide();
    $("#id_concept_headimg4").hide();
    $("#id_concept_content5").hide();
    $("#id_concept_headimg5").hide();
    $("#id_concept_content6").hide();
    $("#id_concept_headimg6").hide();
    $("#id_concept_content7").hide();
    $("#id_concept_headimg7").hide();
    
    //$("#nav2").fadeIn("slow");
    $("#nav2").show();
    
});


function changepos(msel) {
     // auswahl wechseln
     //console.log(lastfademenu);
     if(lastfademenu != "")
         $(lastfademenu).fadeOut("slow");
     if(msel=='m1') {
          $("#pfeil").animate({ top: "210" } , {duration:500 , easing:"easeOutBounce"});
          $("#id_concept_content1").fadeIn("slow");
          lastfademenu='#id_concept_content1';
     }
     if(msel=='m2') {
          $("#pfeil").animate({ top: "237" } , {duration:500 , easing:"easeOutBounce"});
          $("#id_concept_content2").fadeIn("slow");
          lastfademenu='#id_concept_content2';
     }
     if(msel=='m3') {
          $("#pfeil").animate({ top: "294" } , {duration:500 , easing:"easeOutBounce"});
          $("#id_concept_content3").fadeIn("slow");
          lastfademenu='#id_concept_content3';
     }
     if(msel=='m4') {
          $("#pfeil").animate({ top: "337" } , {duration:500 , easing:"easeOutBounce"});
          $("#id_concept_content4").fadeIn("slow");
          lastfademenu='#id_concept_content4';
     }
     if(msel=='m5') {
          $("#pfeil").animate({ top: "393" } , {duration:500 , easing:"easeOutBounce"});
          $("#id_concept_content5").fadeIn("slow");
          lastfademenu='#id_concept_content5';
     }
     if(msel=='m6') {
          $("#pfeil").animate({ top: "420" } , {duration:500 , easing:"easeOutBounce"});
          $("#id_concept_content6").fadeIn("slow");
          lastfademenu='#id_concept_content6';
     }
     if(msel=='m7') {
          $("#pfeil").animate({ top: "447" } , {duration:500 , easing:"easeOutBounce"});
          $("#id_concept_content7").fadeIn("slow");
          lastfademenu='#id_concept_content7';
     }
      // class
      document.getElementById('m1').className="concept_menu_unselect";
      document.getElementById('m2').className="concept_menu_unselect";
      document.getElementById('m3').className="concept_menu_unselect";
      document.getElementById('m4').className="concept_menu_unselect";
      document.getElementById('m5').className="concept_menu_unselect";
      document.getElementById('m6').className="concept_menu_unselect";
      document.getElementById('m7').className="concept_menu_unselect";

      document.getElementById(msel).className="concept_menu_select";
      // text
      // bild
      
}