<!--
function comprueba_valores(){
	if (document.forms[0].nombre.value=='') {
  		alert('Please, insert your name.');
  		return false;
	};
	if ((document.forms[0].telefono.value=='')&&(document.forms[0].fax.value=='')&&
		(document.forms[0].mail.value=='')) {
		alert('Please, insert at least one contact method');
 		return false;
	};
	if ((document.forms[0].mail.value!='')&&((document.forms[0].mail.value.indexOf('@')<=0)||(document.forms[0].mail.value.indexOf('.')<=0))){
  		alert('Error: wrong e-mail address. Please, insert a correct e-mail address.');
 		return false;
	};
	if ((document.forms[0].peticion.value=='')||(document.forms[0].peticion.value=='')){
 		alert('Error: Please, insert the text of your request.');
  		return false;
	};
	window.open("", t, "width=600,height=550");
	return true;
}
//-->