var keyStr = "ABCDEFGHIJKLMNOP" +
            "QRSTUVWXYZabcdef" +
            "ghijklmnopqrstuv" +
            "wxyz0123456789+/" +
            "=";

function decode64(input) {
  var output = "";
  var chr1, chr2, chr3 = "";
  var enc1, enc2, enc3, enc4 = "";
  var i = 0;

  // remove all characters that are not A-Z, a-z, 0-9, +, /, or =
  var base64test = /[^A-Za-z0-9\+\/\=]/g;
  if (base64test.exec(input)) {
  	return false;
  }
  input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");

  do {
     enc1 = keyStr.indexOf(input.charAt(i++));
     enc2 = keyStr.indexOf(input.charAt(i++));
     enc3 = keyStr.indexOf(input.charAt(i++));
     enc4 = keyStr.indexOf(input.charAt(i++));

     chr1 = (enc1 << 2) | (enc2 >> 4);
     chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
     chr3 = ((enc3 & 3) << 6) | enc4;

     output = output + String.fromCharCode(chr1);

     if (enc3 != 64) {
        output = output + String.fromCharCode(chr2);
     }
     if (enc4 != 64) {
        output = output + String.fromCharCode(chr3);
     }

     chr1 = chr2 = chr3 = "";
     enc1 = enc2 = enc3 = enc4 = "";

  } while (i < input.length);

  return output;
}

function frm_init(frm)
{
	var getVars = new Array();
	var query = window.location.search.substring(1);
	var vars;
	if (query != '') {
		vars = query.split("&");
		query = decode64(vars[vars.length-1]);
		if (query != false) {
			vars = query.split("&");
			for (var i=0;i<vars.length;i++) {
				var pair = vars[i].split("=");
				getVars[pair[0]] = pair[1];
			}
			var i; var elem; var mitipo;
			for (i = 0; i < frm.elements.length; i++)
			{
				mitipo = frm.elements[i].type;
				if (mitipo != 'hidden' && mitipo != 'submit' && mitipo != 'reset' && mitipo != 'image' && mitipo != 'button' && frm.elements[i].readOnly != true && frm.elements[i].disabled != true)
				{
					elem = frm.elements[i].name;
					if (getVars[elem] != undefined) {frm.elements[i].value = getVars[elem];}
				}
			}

			if (getVars['coderror'] == 'true')
			{
				alert('El código introducido no es correcto, por favor, inténtelo de nuevo.')
				frm.code.focus();
			}
		}
	}
}

function checkemail(str)
{
	var filter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i
	return (filter.test(str))
}



function comprobar(frm)
{
	ok = true;
	if (frm.realname.value=="")
	{
		alert('No se ha introducido un valor para "Nombre y Apellidos"');
		frm.realname.focus();
		ok = false;
	}
	else if (frm.telefono.value=="" && !checkemail(frm.email.value))
	{
		alert('No se ha introducido forma de contacto: "Teléfono o email"');
		frm.email.focus();
		ok = false;
	}

	return ok;
}


function borrar(frm) {frm.reset();}