function changelng(idioma){

	if (idioma == "esp"){
		document.getElementById("esp").style.visibility = 'visible'; 
		document.getElementById("cat").style.visibility = 'hidden'; 
		document.getElementById("ang").style.visibility = 'hidden'; 
	}else if(idioma == "ang"){
		document.getElementById("esp").style.visibility = 'hidden'; 
		document.getElementById("cat").style.visibility = 'hidden'; 
		document.getElementById("ang").style.visibility = 'visible';
	}else if(idioma == "cat"){
		document.getElementById("esp").style.visibility = 'hidden'; 
		document.getElementById("cat").style.visibility = 'visible'; 
		document.getElementById("ang").style.visibility = 'hidden';	
	}

}