// global instances and methods
ok               = false;	// browser Version
activated        = -1;		// active button
activated_source = "";

// check browser version
// if valid set ok, on window resize "ok" is lost
if  (( navigator.appVersion.lastIndexOf("3.") != -1 ) || ( navigator.appVersion.lastIndexOf("4.") != -1 ) || ( navigator.appVersion.lastIndexOf("5.") != -1) || ( navigator.appVersion.lastIndexOf("6.") !=-1 ))
{
	ok = true;
}

//if (ok)
//{	
	quad_l = new Image(); quad_l.src  = "/images/quad_l.GIF";			 
	quad_v = new Image(); quad_v.src  = "/images/quad_v.GIF";
//	
//}

// temporary pushed buttons
function active(imgDocID, imgObjName)
{
	if (imgDocID != activated)
	{
		document.getElementById("rechteck"+imgDocID).src = imgObjName.src;
	}
}

// save position of pushed buttons
function clicked (imgDocID, imgObjName)
{
	// check on pushed buttons
	if (activated != imgDocID)
	{
		 if (activated >= 0) document.getElementById("rechteck"+imgDocID).src = activated_source;
		 
		 // save clicked position (ID and OBJ) if different to actual position
		 activated = "rechteck"+imgDocID;
		 activated_source = imgObjName.src;
	}
}