function expandcontent(rel){
    var contentSectionHolder = document.getElementById("contentSectionHolder");
    var contentSections = contentSectionHolder.getElementsByTagName("div");
    
    for (var i=0; i<contentSections.length; i++){
    
        contentSections[i].style.display="none" //hide all tab contents
    }   
    
    document.getElementById(rel).style.display="block";
}

function initializetabcontent(){
    for (var i=0; i<arguments.length; i++){ //loop through passed UL ids
            
        var ulobj=document.getElementById(arguments[i])
        var ulist=ulobj.getElementsByTagName("li") //array containing the LI elements within UL
        
        for (var x=0; x<ulist.length; x++){ //loop through each LI element
            var ulistlink=ulist[x].getElementsByTagName("a")[0]
            if (ulistlink.getAttribute("rel")){
                ulistlink.onclick=function(){
                expandcontent(this.getAttribute("rel"));
                return false
                }
            }
        } //end inner for loop
    } //end outer for loop
}