[removed] Overriding alert()

Question

Has anyone got any experience with overriding the alert() function in JavaScript?

• Which browsers support this?
• Which browser-versions sup

Answer 1

Ladislav.
For IE8 you can redefine alert() like this way

/** 
 * Definition of global attached to window properties 

 */ 
    (function() {
      nalert = window.alert;
      Type = {
          native: 'native',
          custom: 'custom'
      };
    })();

/**
 * Factory method for calling alert(). 
 * It will be call a native alert() or a custom redefined alert() by a Type param.
 * This defeinition need for IE
 */ 
    (function(proxy) {

          proxy.alert = function () {
          var message = (!arguments[0]) ? 'null': arguments[0];
          var type = (!arguments[1]) ? '': arguments[1];

          if(type && type == 'native') {
           nalert(message);
          }
          else {
               document.write('
I am redefiend alert()
Alert say: '+message+'
');
          }     
      };
   })(this);

and call as

alert('Hello, hacker!');
nalert('I am native alert');
alert('Hello, user!', Type.custom);