function HideAllShowOne(d) {
        
        var IDvaluesOfEachDiv = "content_nav_who content_nav_what content_nav_approach content_nav_how content_nav_clients content_nav_papers  content_nav_blog";
        IDvaluesOfEachDiv = IDvaluesOfEachDiv.replace(/[,\s"']/g," ");
        IDvaluesOfEachDiv = IDvaluesOfEachDiv.replace(/^\s*/,"");
        IDvaluesOfEachDiv = IDvaluesOfEachDiv.replace(/\s*$/,"");
        IDvaluesOfEachDiv = IDvaluesOfEachDiv.replace(/  +/g," ");
		
		
		if(document.getElementById(d).style.display == "block") { document.getElementById(d).style.display = "none";}
		else
        var IDlist = IDvaluesOfEachDiv.split(" ");
        for(var i=0; i<IDlist.length; i++) { HideContent(IDlist[i]); }
        ShowContent(d);
        }
        
        function HideContent(d) {
        document.getElementById(d).style.display = "none";
        }
        function ShowContent(d) {
        document.getElementById(d).style.display = "block";
        }

		function ReverseDisplay(d) {
        if(document.getElementById(d).style.display == "none") { document.getElementById(d).style.display = "block"; }
        else { document.getElementById(d).style.display = "none"; }
        }
	    function HighlightClass() {
        document.getElementById("wholink").setAttribute("class", "highlight");
        }
		function DimClass() {
        document.getElementById("wholink").setAttribute("class", "dim");
        }
		
        //-->