javascript - TypeError: name.toLowerCase is not a function -

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i creating auto-complete code list countries json array. works fine, error in console. don't know when harmful. please can solve this?

css

.mainpart {     width:100%;     height:auto; } .first {     width:150px;     height:25px;     float:left } .second {     width:150px;     height:25px;     float:left } ul, li {     list-style:none; } .li-autolist {     background-color:#cbcacc;     border:1px solid #fff;     cursor:pointer; }

html

<div class="mainpart">     <div class="first">         <input type="text" id="county" onclick="autolist('#county','country')" />     </div>     <div class="second">         <input type="text" id="county2" onclick="autolist('#county2','city')" />     </div> </div>

js

<script type="text/javascript">   function autosort(id,list){      if(list=='country'){       county=(co.response.data);     }else{       county=(ci.response.data);         }      li='';      for(i=0;i<county.length;i++){       c=$(id).val().touppercase().replace(/["'\(\)]/g, "");       condec=county[i].description+'('+county[i].cod+')';       condec=condec.touppercase().replace(/["'\(\)]/g, "");       n=(condec.search(c));        if(n>=0){         cname=county[i].description+'('+county[i].cod+')';         li+='<li class="li-autolist"><input type="checkbox" class="itm"    value="'+county[i].description+'('+county[i].cod+')">'+county[i].description+'</li>';       }      }      $('.li-autolist').remove();     $(id).after(li);   }    function autolist(id,list){      if(list=='country'){       county=(co.response.data);     }else{       county=(ci.response.data);         }      li='';      for(i=0;i<county.length;i++){       c=$(id).val().touppercase().replace(/["'\(\)]/g, "");       condec=county[i].description+'('+county[i].cod+')';       condec=condec.touppercase().replace(/["'\(\)]/g, "");       n=(condec.search(c));       chk='';        if(condec==c){         chk='checked';       }        cname=county[i].description+'('+county[i].cod+')';       li+='<li class="li-autolist liitm"><input type="checkbox" '+chk+' class="itm"   value="'+county[i].description+'('+county[i].cod+')">'+county[i].description+'</li>';     }      $('.li-autolist').remove();     $(id).after(li);      $('.itm').click(function(){ $(id).val( $(this).val());        $('.li-autolist').remove();       //  autolist(id,list);     });      $('.liitm').click(function(){        //  $(id).val( $(this).val());        var cb = $(this).find(":checkbox")[0];       $(id).attr('checked',true);       $(id).val( $(cb).val());        $('.li-autolist').remove();       //  autolist(id,list);     });       $(id).bind({       'keyup': function() {         $('.itm').removeattr('checked');             autosort(id,list)       },       blur: function() {         //if checkbox checked         if(!$('.itm').attr('checked'&&( $(id).val()==''))){           $(id).val(null);           autolist(id,list)         }        }     });   }   var ci={"response":{"status":"0", "data":[{"cod":"slst" ,"description":"san luis talpa"      , "group":"sv"},{"cod":"sa6" ,"description":"san salvador" , "group":"sv"}]}};    var co={"response":{"status":"0", "data":[{"cod":"fr-ag" ,"description":"agay" , "group":"altro"},{"cod":"fr-ai" ,"description":"aix en provence" , "group":"altro"},{"cod":"al" ,"description":"albania" , "group":"le più cliccate"},{"cod":"dz" ,"description":"algeria" , "group":"altro"},{"cod":"fr-am" ,"description":"amiens" , "group":"altro"},{"cod":"ad" ,"description":"andorra" , "group":"altro"},{"cod":"zw" ,"description":"zimbabwe" , "group":"altro"}]}}; </script> </body>

i think should wrong in line:

if (!$('.itm').attr('checked' && ($(id).val()==''))) {

it might this:

if (!$('.itm').attr('checked') && ($(id).val()=='')) {

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