I need to show an alert if my field is hidden in quick create screen pop up

Nitram

I like to do the following ,

if(AJS.$("#customfield_10000").hide()==true){
			alert("hi");
		}

But this is not happening, Can u tell me how to check and show an alert.Thanks for the help in advance.

grundic

if( AJS.$('#customfield_10000').is(':hidden') ){
  //JIRA.Messages.showWarningMsg("Hidden!");
  alert("Hidden!"); 
}