function selLn(ln) {
	ro_sel = new Image();
	ro_sel.src = 'images/ln_ro_selected.jpg';
	ro_nor = new Image();
	ro_nor.src = 'images/ln_ro_normal.jpg';
	
	en_sel = new Image();
	en_sel.src = 'images/ln_en_selected.jpg';
	en_nor = new Image();
	en_nor.src = 'images/ln_en_normal.jpg';
	
	if (ln=='ro') {
		document['imgRo'].src=ro_sel.src;
		document['imgEn'].src=en_nor.src;
	}else if(ln=='en') {
		document['imgRo'].src=ro_nor.src;
		document['imgEn'].src=en_sel.src;
	}
}