function contar(texto,e,max) {
    
    if (texto.length > max ) {
        if (navigator.appName == "Netscape") tecla = e.which
        else tecla = e.keyCode
        if (tecla != 8) return false
    }
    return true

}

function confirmLink(theLink, text, theLocation) {

    var confirmMsg  = 'Realmente desea ';

    if (confirmMsg == '' || typeof(window.opera) != 'undefined') {
        return true;
    }

    var is_confirmed = confirm(text);
    if (is_confirmed) {
        
        var myregexp = /void/;
		var match = myregexp.exec(theLink);
        
        if ( theLink == '' || match != null || typeof(theLink) == 'undefined' ) {
        	setTimeout('document.location.href="'+theLocation+'"',0);
        } else {
        	setTimeout('window.open("'+theLocation+'", "'+theLink+'");',0);
        }
        
    }

    return is_confirmed;
}

function confirmLinkAjax(theLink, text, theLocation) {

    var confirmMsg  = 'Realmente desea ';

    if (confirmMsg == '' || typeof(window.opera) != 'undefined') {
        return true;
    }

    var is_confirmed = confirm(text);
    if (is_confirmed) {
        
        var jqxhr = $.get(theLocation).done(function(dataresult) {
	        
	        //console.log(dataresult);
	        
	        var jsonobj = jQuery.parseJSON(dataresult);
		    
		    if ( jsonobj.status == 'success' ) {
			    
			    alert('Contenido enviado con éxito a Facebook');
			    
		    } else {
			    
			    alert('Se ha producido un error al enviar')
			    
		    }
		    
		});
        
    }

    return is_confirmed;
}

function checkform(form) {
  
  var elements = form.elements; 

  for(i=0; i<elements.length; i++) {
    
        if (elements[i].className=='req') {
      
            field_type = elements[i].type.toLowerCase();
	
            switch(field_type) {
	
	            case "text": 
	            case "password": 
	            case "textarea":
	            case "hidden":
	            case "file":
	            		if (elements[i].value == "" || elements[i].value == "http://") {
                            form.elements[i].focus();
                            form.elements[i].style.backgroundColor='#dfaaa8';
                            alert('Has olvidado rellenar el campo: '+form.elements[i].name);
                            return false;
                        } else {
                            form.elements[i].style.backgroundColor='#FFFFFF';
                        }
                        break;
        
				case "radio":
				case "checkbox":
						if (!elements[i].checked) {
                            form.elements[i].focus();
                            form.elements[i].style.backgroundColor='#dfaaa8';
                            alert('Has olvidado rellenar el campo: '+form.elements[i].name);
                            return false; 
                        } else {
                            form.elements[i].style.backgroundColor='#FFFFFF';
                        }
                        break;

                case "select-one":
                case "select-multi":
                case "select-multiple":
            			if (elements[i].selectedIndex == -1 || elements[i].value == "0") {
                            form.elements[i].focus();
                            form.elements[i].style.backgroundColor='#dfaaa8';
                            alert('Has olvidado rellenar el campo: '+form.elements[i].name);
                            return false;
                        } else {
                            form.elements[i].style.backgroundColor='#FFFFFF';
                        }
                        break;

                default: 
                		break;
            }
        }
    }
  
  return true ;
    
}