/* accordion tab changer */
function change_tab(){
   for (var i=0; i<change_tab.arguments.length; i++) {
       var element = document.getElementById(change_tab.arguments[i]);
        if (i==0){
        element.style.display = (element.style.display == "none") ? "block" : "block";
        }
        else {
        element.style.display = (element.style.display == "none") ? "none" : "none";            
        }

    }
}   
function select_tab(){
   for (var i=0; i<select_tab.arguments.length; i++) {
       var element = document.getElementById(select_tab.arguments[i]);
    if (i==0){
       element.className = (element.className == "") ? "selected" : "selected";
    }
    else {
       element.className = (element.className == "") ? "" : ""; 
        } 
   }
}