function objAjax() { 
	try { 
		ajaxobj = new ActiveXObject("Msxml2.XMLHTTP"); 
	}catch (e) { 
		try { 
			ajaxobj = new ActiveXObject("Microsoft.XMLHTTP"); 
		}catch (E) { 
			ajaxobj = false; 
		} 
	} 
    
	if (!ajaxobj && typeof XMLHttpRequest!='undefined') { 
	   ajaxobj = new XMLHttpRequest(); 
    } 
 
  return ajaxobj; 
} 
 
function mandarArt(nom1,mail1,nom2,mail2,cat,subb) { 
  var ajax = objAjax(); 
  var res;
  
	ajax.open("GET", "mailAmigo.php?nom1="+nom1+"&mail1="+mail1+"&nom2="+nom2+"&mail2="+mail2+"&clave="+cat+"&sub="+subb, true);
	ajax.onreadystatechange = function() {
		if (ajax.readyState == 4) {			
		    res = ajax.responseText; 
			//document.write(res);
			if (res == "1") { alert("El Mail a sido enviado."); }
			document.getElementById("txtNomMio").value = "";
            document.getElementById("txtMailMio").value = "";
            document.getElementById("txtNomAmigo").value = "";
            document.getElementById("txtMailAmigo").value = "";
			document.getElementById("divAmigo").style.display = "none";
		}
	}
	ajax.send(null) 
}

function capa() {
  var capa = document.getElementById("divAmigo"); 
	 if (capa.style.display == "none") {
	    capa.style.display = "block";	 
  	 }else {
		capa.style.display = "none";	 
	 }		   
}
	 
function validaDatos() {

  var nom1  = document.getElementById("txtNomMio").value;
  var mail1 = document.getElementById("txtMailMio").value;
  var nom2  = document.getElementById("txtNomAmigo").value;
  var mail2 = document.getElementById("txtMailAmigo").value;
  var cat   = document.getElementById("txtCat").value;
  var subb  = document.getElementById("txtSub").value;

    if (nom1 == "" || mail1 == "" || nom2 == "" || mail2 == "") 
	   alert("Debe de llenar todos los campos.");	
	else
	  mandarArt(nom1,mail1,nom2,mail2,cat,subb);
}