function ToggleContent(obj)
{
	if(document.getElementById)
	{
	    var el = document.getElementById(obj);
	    var ar = document.getElementById("masterdiv").getElementsByTagName("div"); 
		
		if(obj=="All")
		{
		    for (var i=0; i<ar.length; i++)
		    {
			if (ar[i].className=="contentSection") 
			    ar[i].style.display = "block";
		    }
		}
		else
		{		
		    for (var i=0; i<ar.length; i++)
		    {
			if (ar[i].className=="contentSection") 
			    ar[i].style.display = "none";
    	            }
		
		    el.style.display = "block";
		}
		
	}
}