function changeD(object_item, status)//auto switch
{
	var the_item = document.getElementById(object_item);

	if (document.getElementById)
	{ // DOM3 = IE5, NS6
		the_item.style.display = status;
		
	}
	else
	{
		if (document.layers)
		{ // Netscape 4
				the_item.display = status;
			}
		else
		{ // IE 4
			the_item.style.display = status;
		}
	}
}
				
function checktab()
{
    var tab = getvar('tab');
    if (tab == "films")
    {
        changeD('films','block'); 
        changeD('animated_poetry','none'); 
        changeD('portfolio','none');
    }
    if (tab == "portfolio")
    {
        changeD('films','none'); 
        changeD('animated_poetry','none'); 
        changeD('portfolio','block');
    }  
    if (tab == "poetry")
    {
        changeD('films','none'); 
        changeD('animated_poetry','block'); 
        changeD('portfolio','none');
    }  
}
function getvar(name)
{
  name = name.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
  var regexS = "[\\?&]"+name+"=([^&#]*)";
  var regex = new RegExp( regexS );
  var results = regex.exec( window.location.href );
  if( results == null )
    return "";
  else
    return results[1];
}