function getyScroll()
 {
  yScroll = 0;

  if (window.innerHeight && window.scrollMaxY || window.innerWidth && window.scrollMaxX)
   {
    yScroll = window.innerHeight + window.scrollMaxY;
    xScroll = window.innerWidth + window.scrollMaxX;

    var deff = document.documentElement;
    var wff = (deff&&deff.clientWidth) || document.body.clientWidth || window.innerWidth || self.innerWidth;
    var hff = (deff&&deff.clientHeight) || document.body.clientHeight || window.innerHeight || self.innerHeight;

    xScroll -= (window.innerWidth - wff);
    yScroll -= (window.innerHeight - hff);
   } 
  else if (document.body.scrollHeight > document.body.offsetHeight || document.body.scrollWidth > document.body.offsetWidth)
   { // all but Explorer Mac
    yScroll = document.body.scrollHeight;
    xScroll = document.body.scrollWidth;
   } 
  else 
   { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
    yScroll = document.body.offsetHeight;
    xScroll = document.body.offsetWidth;
   }

  return yScroll;
 }
 
 function showform($target)
{
	if($target=='login'){
		$('loginform').style.display = 'block';
	}else{$('reg').style.display = 'block';};
	$('scr').style.display = 'block';
	$('scr').style.height = getyScroll() + 'px';
}

function hideloginform()
 {
$('loginform').style.display = 'none';$('reg').style.display = 'none';
$('scr').style.display = 'none';
 }
 
 function dload($target)
 {
	 
	 if($target=='dl'){
		$('load').style.backgroundImage='url(images/download.gif)';
	 }else{
		 $('load').style.backgroundImage='url(images/upload.gif)';
	 };
	 $('load').style.display='block';
 } 
 function dmedia($target)
 {
	 if($target=='ph'){
		$('media').style.backgroundImage='url(images/photo.gif)';
	 }else{
		 $('media').style.backgroundImage='url(images/pictures.gif)';
	 };
	 $('media').style.display='block';
 } 
 function dwork($target)
 {
	 if($target=='sites'){
		$('work').style.backgroundImage='url(images/e.gif)';
	 }else{
		 $('work').style.backgroundImage='url(images/polygraph.gif)';
	 };
	 $('work').style.display='block';
 }
 function hided()
 {
	  $('load').style.display='none';
	  $('media').style.display='none';
	  $('work').style.display='none';
 }