Overriding a function

Elcid32 · 07-28-2006, 06:03 PM

Hello again, Forum:

I have a question for ya. Is it possible to redefine a function in Javascript? For example:

Code:

function myTest(){

  this.showAlert = function(){
    alert('Show Me!')
  }
  this.callAlert = function(){
    this.showAlert();
  }
}
test = new myTest;
test.showAlert = function(){ alert('No! Show Me Instead')}
test.callAlert;

Thank you!

Mr J · 07-28-2006, 11:10 PM

Give this a try

PHP Code:


			
function myTest(){



  this.showAlert = function(){

    alert('Show Me!')

  }

  

  this.callAlert = function(){

    this.showAlert();

  }

  

}



test = new myTest;

test.showAlert = function(){ alert('No! Show Me Instead')}

test.callAlert()

Kor · 07-30-2006, 07:24 AM

Or, considering that functions are objects which belong to the window element:

PHP Code:


			
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"  "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta http-equiv="Content-Style-Type" content="text/css">
<meta http-equiv="Content-Script-Type" content="text/javascript">
<script type="text/javascript">
function myTest(){
alert('Show Me!')
}
function redefinemyTest(){
window['myTest']= function(){alert('No! Show Me Instead')}
}
</script>
</head>
<body>
<input type="button" value="Alert" onclick="myTest()">
<br>
<br>
<input type="button" value="Redefine function" onclick="redefinemyTest()">
</body>
</html>