if (document.images) 
   {
   ph1 = new Image(117,28);
   ph1.src = "/penn_portal/images/btn-home1.gif";
   ph2 = new Image(117,28);
   ph2.src = "/penn_portal/images/btn-home2.gif";
 
   pl1 = new Image(79, 28);
   pl1.src = "/penn_portal/images/btn-pl1.gif";
   pl2 = new Image(79, 28);
   pl2.src = "/penn_portal/images/btn-pl2.gif"; 

   wm1 = new Image(75,28);
   wm1.src = "/penn_portal/images/btn-webmail1.gif";
   wm2 = new Image(75,28);
   wm2.src = "/penn_portal/images/btn-webmail2.gif";

   di1 = new Image(88,28);
   di1.src = "/penn_portal/images/btn-directories1.gif";
   di2 = new Image(88,28);
   di2.src = "/penn_portal/images/btn-directories2.gif";

   az1 = new Image(79,28);
   az1.src = "/penn_portal/images/btn-az1.gif";
   az2 = new Image(79,28);
   az2.src = "/penn_portal/images/btn-az2.gif";

   lo1 = new Image(73,28);
   lo1.src = "/penn_portal/images/btn-logout1.gif";
   lo2 = new Image(73,28);
   lo2.src = "/penn_portal/images/btn-logout2.gif";

   pc1 = new Image(79,28);
   pc1.src = "/penn_portal/images/btn-pc1.gif";
   pc2 = new Image(79,28);
   pc2.src = "/penn_portal/images/btn-pc2.gif";

   cv1 = new Image(91,28);
   cv1.src = "/penn_portal/images/btn-chgview1.gif";
   cv2 = new Image(91,28);
   cv2.src = "/penn_portal/images/btn-chgview2.gif";	
   

   }

function imgSwap(imgDocID,imgObjName) 
   {
   if (document.images) 
      { document.images[imgDocID].src = eval(imgObjName + ".src") }
   }

function showHideBlock (divId){

	var ID = document.getElementById(divId);

	if (ID.style.display=="none") {

		ID.style.display="block";

	} else {

		ID.style.display="none";

	}
}

function showHideInline (divId){

        var ID = document.getElementById(divId);

        if (ID.style.display=="none") {

                ID.style.display="inline";

        } else {

                ID.style.display="none";

        }
}

function showHideChannel (channelBodyDivId,
			  minMaxImageDivId,
			  channelCorners) {


        var ID = document.getElementById(channelBodyDivId);
	var imageID = document.getElementById(minMaxImageDivId);

        if (ID.style.display=="none") {

                ID.style.display="block";

		if (channelCorners == "R") {

		  imageID.src="/penn_portal/images/flex_arrow_open.png";

		} else {

		  imageID.src="/penn_portal/images/channelminimize.gif";
		  
		}

        } else {

                ID.style.display="none";
	
		if (channelCorners == "R") {

		  imageID.src="/penn_portal/images/flex_arrow_shut.png";

		} else {

		  imageID.src="/penn_portal/images/channelmaximize.gif";
		 
		}

        }

}