function butOn( button )
{ 
	if ( document.images && button.length > 0 ) 	
	{
		self.document.images[button].src = 'images/' + button + '_on.gif'; 
	}
} 

function butOff( button )
{ 
	 if ( document.images && button != thisPlace ) 
	{
		 self.document.images[button].src = 'images/' + button + '_off.gif'; 
	}
}





function openWin(url,width,height,scrollbars)
	{
		var posx = screen.width/2 - width/2;  
		var posy = screen.height/2 - height/2;
		var propsZ=(document.all)?('top=' + posy + ',left=' + posx):('screenX=' + posx + ',screenY=' + posy);
		var props = 'width=' + width + ',height=' + height + ',scrollbars=' +scrollbars + ',' + propsZ;
		
		window.open(url, "", props);
	}	
	
function makeAdr(suffix, domain, receiver)
{
	location.href = "mailto:" + receiver + "@" + domain + "." + suffix;
}

function writeAdr(suffix, domain, receiver)
{
	document.write(receiver + "@" + domain + "." + suffix);
}