Question

I have a string and I need to check if there is in the page a div with id = to my string.

How can i do this with jquery?

Like:

if (isset $(mystring))
 // do somethinhg

Answer 1

if ($("#" + mystring).length > 0)
  alert(mystring + " exists!");
else
  alert("element with id " + mystring + " does not exist..");

Have this code either in the bottom of the page or wrapped inside $(document).ready() function otherwise even if the element exists further in the page it won’t be recognized.