function preLoad()
{
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  m_modele_on = new Image();
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  m_3dsmax2_on = new Image();
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  m_3dsmax3_on = new Image();
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  m_3dsmax2p_on = new Image();
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};

function on(name,layerid)
{
	document[layerid].document[name].src = eval(name + "_on.src");
};
function off(name,layerid)
{
	document[layerid].document[name].src = eval(name + "_off.src");
};

function pokaz(blok)
{
	document[blok].visibility = "visible";
};
function ukryj(blok)
{
	document[blok].visibility = "hidden";
};