geocode - google maps geocoder to return state -

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i using google maps geocoder geocode zipcode , want return state zipcode located in , store in variable "local". getting error indicating local undefined. why?

see code below:

var address=document.getelementbyid("address").value; var radius=document.getelementbyid("radius").value; var latitude=40; var longitude=0; var local; geocoder.geocode( { 'address': address}, function(results, status){ if (status==google.maps.geocoderstatus.ok){ latlng=(results[0].geometry.location); latitude=latlng.lat(); longitude=latlng.lng(); //store state abbreviation in variable local local=results[0].address_components.types.adminstrative_area_level_1; }     else{     alert("geocode not successful following reason: " + status); } });

i think issue address_components have more 1 component, , order isn't same zip codes. have iterate through results find correct one. 

<html xmlns="http://www.w3.org/1999/xhtml"> <script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script> <script type="text/javascript"> var geocoder = new google.maps.geocoder(); function test() {     var address=document.getelementbyid("address").value;     var local = document.getelementbyid("local");     var latitude=40;     var longitude=0;     geocoder.geocode( { 'address': address}, function(results, status)     {         if (status==google.maps.geocoderstatus.ok)         {             latlng=(results[0].geometry.location);             latitude=latlng.lat();             longitude=latlng.lng();             //store state abbreviation in variable local             for(var ix=0; ix< results[0].address_components.length; ix++)             {                 if (results[0].address_components[ix].types[0] == "administrative_area_level_1")                 {                     local.value=results[0].address_components[ix].short_name;                 }             }         }         else         {             alert("geocode not successful following reason: " + status);         }     }); } </script> </head> <body>     <input type='text' id='address' value='84102' />     <input type='text' id='local' value='' />     <a href='#' onclick="test();" >try</a> </body> </html>

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