function showLang(lang_type){

img_UK=document.getElementById('uk_flag');
img_DE=document.getElementById('de_flag');

	if(lang_type=='en') {
		document.getElementById('en').style.display="block";
 	    document.getElementById('de').style.display="none";
 	    img_UK.src="../sites/default/files/op_assets/uk_flag.png";
 	    img_DE.src="../sites/default/files/op_assets/de_flag_gr.png";
	}
	else if(lang_type=='de') {
		document.getElementById('de').style.display ="block";
 	    document.getElementById('en').style.display="none";
 	    img_UK.src="../sites/default/files/op_assets/uk_flag_gr.png";
 	    img_DE.src="../sites/default/files/op_assets/de_flag.png";
	}
}