function foco(elemento) {
  elemento.style.border = "1px solid #000000";
}

function no_foco(elemento) {
  elemento.style.border = "1px solid #CCCCCC";
}

var filter = /^([1-9][0-9]{0,2})+\.([1-9][0-9]{0,2})+\.([1-9][0-9]{0,2})+\.([1-9][0-9]{0,2})+$/;

function getXmlHttpRequestObject() {
 if (window.XMLHttpRequest) {
    return new XMLHttpRequest(); //Mozilla, Safari ...
 } else if (window.ActiveXObject) {
    return new ActiveXObject("Microsoft.XMLHTTP"); //IE
 } else {
    alert("Your browser doesn't support the XmlHttpRequest object.");
 }
}

var receiveReq = getXmlHttpRequestObject();

function makeRequest(url, param) {
 if (receiveReq.readyState == 4 || receiveReq.readyState == 0) {

   receiveReq.open("POST", url, true);
   receiveReq.onreadystatechange = updatePage;

   receiveReq.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
   receiveReq.setRequestHeader("Content-length", param.length);
   receiveReq.setRequestHeader("Connection", "close");

   receiveReq.send(param);
 }
}

function updatePage() {
 if (receiveReq.readyState == 4) {

		var res = receiveReq.responseText;

		if (res == "OK") {
			document.getElementById('analisis').innerHTML = '<b>G-LINE Eliminada</b>';
		} else if (res == "ERROR1") {
			document.getElementById('sec').innerHTML = '<img id="imgCaptcha" src="create_image.php?' + Math.random() + '" border=1>';
			document.getElementById('codigo').value = '';
			document.getElementById('txtCaptcha').value = '';
			document.getElementById('todo').style.display = "inline";
			document.getElementById('analisis').innerHTML = 'El c&oacute;digo de la G-LINE es demasiado corto';
			document.getElementById('codigo').focus();
		} else if (res == "ERROR2") {
			document.getElementById('sec').innerHTML = '<img id="imgCaptcha" src="create_image.php?' + Math.random() + '" border=1>';
      document.getElementById('codigo').value = '';
      document.getElementById('txtCaptcha').value = '';
      document.getElementById('todo').style.display = "inline";
      document.getElementById('analisis').innerHTML = 'El c&oacute;digo de la G-LINE contiene<br>caracteres no v&aacute;lidos';
      document.getElementById('codigo').focus();
		} else if (res == "ERROR3") {
			document.getElementById('sec').innerHTML = '<img id="imgCaptcha" src="create_image.php?' + Math.random() + '" border=1>';
      document.getElementById('codigo').value = '';
      document.getElementById('txtCaptcha').value = '';
      document.getElementById('todo').style.display = "inline";
      document.getElementById('analisis').innerHTML = 'El c&oacute;digo de la G-LINE no concuerda con tu IP';
      document.getElementById('codigo').focus();
		} else if (res == "ERROR4") {
			document.getElementById('sec').innerHTML = '<img id="imgCaptcha" src="create_image.php?' + Math.random() + '" border=1>';
      document.getElementById('codigo').value = '';
      document.getElementById('txtCaptcha').value = '';
      document.getElementById('todo').style.display = "inline";
      document.getElementById('analisis').innerHTML = 'El c&oacute;digo de la G-LINE no corresponde<br>a ninguna G-LINE activa o que<br>se pueda eliminar por aqui';
      document.getElementById('codigo').focus();
		} else if (res == "ERROR5") {
			document.getElementById('sec').innerHTML = '<img id="imgCaptcha" src="create_image.php?' + Math.random() + '" border=1>';
      document.getElementById('codigo').value = '';
      document.getElementById('txtCaptcha').value = '';
      document.getElementById('todo').style.display = "inline";
      document.getElementById('analisis').innerHTML = 'El c&oacute;digo de seguridad es incorrecto';
      document.getElementById('codigo').focus();
		}

 }

}

function quitar(formulario) {

 if (formulario.codigo.value == '') {
   alert('Falta el codigo de la G-LINE');
   return false;
 }
 
 if (formulario.txtCaptcha.value == '') {
   alert('Falta el codigo de seguridad');
   return false;
 }

 var url = 'quitar_gline.php?gline=' + formulario.codigo.value + '&codigo=' + formulario.txtCaptcha.value + '&ipreal=' + formulario.ipreal.value;
 var postStr = '';
 document.getElementById('todo').style.display = "none";
 document.getElementById('analisis').innerHTML = '<img src="images/analizando.gif" border="0">';
 makeRequest(url, postStr);
}