How to check null objects in jQuery

Question

I\'m using jQuery and I want to check the existence of an element in my page. I have written following code, but it\'s not working:

if($(\"#btext\" + i) != n         


        

Answer 1

Using the length property you can do this.

jQuery.fn.exists = function(){return ($(this).length < 0);}
if ($(selector).exists()) { 
   //do somthing
}