// INTRO TRANSITION FUNCTIONS

// Get a reference to an object
function getObj(id) 
{
    if (document.getElementById) {return document.getElementById(id);}
	else if (document.all) 		 {return document.all[id];}
	else if (document.layers)    {return document.layers[id];}
	else 						 {return false;}
}


// Get a reference to the style definition of an object
function getStyleObj(id) 
{
    if (document.getElementById || document.all) {return getObj(id).style;} 
	else {return getObj(id);}
}

// Set visibility
function vis_set (item, val) 
{
	var el  = getStyleObj(item); 
	el.visibility = val;
}

// Adjust the alpha of an object
function alpha_set (item, val)
{
	var el  = getStyleObj(item);
	if (document.all) {el.filter = "alpha(opacity=" + val +");";}
	else if (document.getElementById) 
	{
		// Avoid mac netscape 6
		if (is_mac10) {el.opacity = parseFloat (val/100);}
	}
}