Check whether an Element Exists using JQuery
In JavaScript to check whether an element exist or not we can use something like this
if(document.getElementById( 'Elementid' ))
But in case of jQuery to check an element exist or not the code can be written like this
if ( $( '#elementId' ).length >0 )
We can also leave the >0 and the code will simply look like this
if ( $( '#elementId' ).length )
In the code above we are using length property of the jQuery collection returned by selector.
To display the element if exist use the show() method, the complete code will look like this
if ( $( "#elementId" ).length ) { $( "#elementId" ).show(); }
so as we can see that jQuery make the code a bit shorter than javascript.
good info