javascript - why is this variable returning "undefined" -


i can't figure out why global variable ismob returning undefined after trying set through if statement.

i have been futting around bit , can seem find answer.

var ismob; var mobmenclicked = false; var scrnrefresh = false;  $('.mobilemen').click(launchmenu);     function scalesite() {                    scalevideo();     scalemenu();         }       function scalemenu() {     ismob=0;     if($(window).width() < 1066)     {          ismob=0;      }     else     {          ismob=1;      }     //chrome .hide function fix     $('.menubar').css('display', 'inline-block');     ismob=0;  }     alert(ismob);'

i thought declaring variable in proper spot. apparently not. can else see error? surely cannot. o.o

call scalesite() in code call rest of function assignment happening. 

$(document).ready(function() {  	var ismob;  	var mobmenclicked = false;  	var scrnrefresh = false;  	scalesite();  	$('.mobilemen').click(launchmenu);    	  	});        function scalesite()  {                    // scalevideo();      scalemenu();          }           function scalemenu()  {      ismob=0;      if($(window).width() < 1066)      {            ismob=0;        }      else      {            ismob=1;        }      //chrome .hide function fix      $('.menubar').css('display', 'inline-block');      ismob=0;        alert(ismob);  }   
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>


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