Categories: Operators

javascript Operators this

@March 15, 2008, 1:22 a.m.

this	Firefox/Netscape/NN 2 IE 3 ECMA 1

Refers to the current object. For example, in a form control object event handler, you can pass the object as a parameter to the function: <input type="text" name="ZIP" onchange="validate(this);>"

Inside a custom object constructor, the keyword refers to the object itself, allowing you to assign values to its properties (even creating the properties at the same time): function CD(label, num, artist) { this.label = label; this.num = num; this.artist = artist; }

Inside a function, the this keyword refers to the function object. However, if the function is assigned as a method of a custom object constructor, this refers to the instance of the object in whose context the function executes.

Example

<input type="text" name="phone" onchange="validate(this.value);">