var load_ok	= 0;
	var aImages = new Array();			// array für die Bildobjekte
	var imgListJPG = new Array( 'thja', 'thso', 'thfe', 'thci');
	var marker	= new Array('n', 'o');

	for(i=0;i<imgListJPG.length;i++) {
		for(j=0;j<marker.length;j++) {
			aImages[imgListJPG[i]+'_'+marker[j]] = new Image();
			aImages[imgListJPG[i]+'_'+marker[j]].src = "../../gfx/btn/btn_theme_"+imgListJPG[i]+"_"+marker[j]+".jpg";
		}
	}

	load_ok = 1;

    function btn_chg( picname, picobj ) {

		if (load_ok) {
			window.document.images[picname].src = aImages[picobj].src;
		}
    }