To check if an element exists in jQuery

You have to put # in front of the id.

$('#elemId').length
---^

Like this.

You can check the existence of the element as below. We support you all.

null undefined NaN empty string ("") 0 false

if($("#lemId")){ // }

http://stackoverflow.com/questions/5515310/is-there-a-standard-function-to-check-for-null-undefined-or-blank-variables-in