var lo=".gif";
var hi="_hi.gif";
var ac="_hi.gif";
var dir="";


var activebutton="";
var lastlosrc="";

function SetHiImg(t, s)
{ 
	if(activebutton!=t.name)t.src=s; 
}

function SetLoImg(t, s)
{ 
	if(activebutton!=t.name)t.src=s; 
}

function SetAcImg(t, sac, slo)
{ 
	if(activebutton!=t.name)
	{
	if (activebutton!="" && lastlosrc!="")
		document.images[activebutton].src=lastlosrc;

	t.src=sac;
	activebutton=t.name;
	lastlosrc=slo;
	}
}

function SetActiveButton(buttonid)
{
  activebutton=buttonid;
  document.images[buttonid].src=dir+buttonid+ac;
}

function CreateButton(buttonid, alttag, thetarget, clickaction)
{
image1=new Image(); image1.src=dir+buttonid;
image2=new Image(); image2.src=dir+buttonid+hi;
image3=new Image(); image3.src=dir+buttonid+ac;
if (!alttag)
  alttag=buttonid;
if (!clickaction)
  clickaction=buttonid+".html";
  
document.write
(
"<a href=\""+clickaction+"\" target=\""+thetarget+"\">\n"+
"<img vspace=\"0\" src=\""+dir+buttonid+lo+"\" name=\""+buttonid+"\"\n"+
" onmouseover=\"SetHiImg(this, '"+dir+buttonid+hi+"')\"\n"+
" onmouseout =\"SetHiImg(this, '"+dir+buttonid+lo+"')\"\n"+
" onclick=\"SetAcImg(this, '"+dir+buttonid+ac+"', '"+dir+buttonid+lo+"')\"\n"+
" alt=\""+alttag+"\""+
" >\n"+
"</a><br>"
);

}