// Picture's change - rollover effect
function show_button( num ) {
	var obj = document.images[ points[num] ];
	if( obj.src == img[num][0].src ) obj.src = img[num][1].src;
	else obj.src = img[num][0].src;
}

// Open new window with parameters
function wo( url, win, w, h, res, scroll )
{
        if( !url) return false;
        if( !win ) win="_blank";
        var W = screen.width-40;
        var H = screen.height-180;
        if( !res ) res = "no";
        if( !scroll ) scroll = "no";
        if( w && w!=800 ) W = w+20;
        if( h ) H = h;
        var left = Math.ceil((screen.width-W)/2);
        var top = Math.ceil((screen.height-H)/2);
        var w = window.open( url, "_blank", "toolbar=no, location=no, directories=no, status=no, menubar=no, scrollbars="+scroll+", resizable="+res+",width="+W+",height="+H+",top="+top+",left="+left);
        return false;
}