The this keyword relates to the current object and is a reference variable. As an illustration:

var address=    
{    
company:"CodeHubs",    
city:"Noida",    
state:"UP",    
fullAddress:function()    
{    
return this.company+" "+this.city+" "+this.state;    
}    
};    
var fetch=address.fullAddress();    
document.writeln(fetch);