drop down menu - Why is this javascript not working on my site? -

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I am trying to cascade the filter according to the country, in which States should filter, with many codes I My site was trying to work, one of the codes I use works well when I use it as a separate demo test code and give the results according to my requirement, But when I in my project So using C code it does not work.

My script code is below: 

  & lt; script type = "text / javascript" & gt; Var Country = New Array ('United States', 'Indonesia', 'Thailand', 'Australia', 'Germany', 'Japan'); Var state = new array (); State ["United States"] = New Array ("Q", "We", "Er", "RT"); State ["Indonesia"] = New Array ("as", "SD", "DF"); Function Resetform (The Form) {/ * Reset Country * / theform.country.options [0] = New Option ("Please Select Country", ""); For (var i = 0; i & lt; country.length; i ++) {theform.country.options [i + 1] = new option (country [i], country [i]); } Theform.country.options [0]. Selected = true; / * Reset state * / theform.state.options [0] = new option ("Please select a state", ""); Theform.state.options [0]. Selected = true; } Updatetestate (the form) {var make = theform.country.options [theform.country.options.selectedIndex] .value; Var newstate = state [make]; Theform.state.options.length = 0; theform.state.options [0] = new option ("Please select a state", ""); (Var i = 0; i & lt; newstate.length; i ++) {theform.state.options [i + 1] = new option (newest [i], newest [i]); } Theform.state.options [0]. Selected = true; } & Lt; / Script & gt;   
 And my HTML code is also below:  
  & lt; Form method = "get" name = "autoselectform" & gt; & Lt; Div class = "control-group" & gt; & Lt; Label & gt; COUNTRY & lt; span style = "font-size: 13px; font-weight: normal; display: none;" & Gt; (Max2) & lt; / Span & gt; & Lt; / Label & gt; & Lt; Select name = "country" size = "2" style = "width: 100%; height: 25px;" Class = "selectinput" id = "filCountry" onchange = "updatestate (this.form)" & gt; & Lt; / Select & gt; & Lt; / Div & gt; & Lt; Div class = "control-group" & gt; & Lt; Label & gt; State & lt; Span style = "font-size: 13px; font-weight: normal; display: none;" & Gt; (Max2) & lt; / Span & gt; & Lt; / Label & gt; & Lt; Choose name = "state" style = "width: 100%; height: 25px;" Class = "selected input" id = "filState" & gt; & Lt; / Select & gt; & Lt; / Div & gt; & Lt; Form & gt;    
 
 
 You have additional locations for the United States in your  array . First you have to fix that one  
  // var country = new array ('United States', 'Indonesia', 'Thailand', 'Australia', 'Germany', 'Japan' ); Var Country = New Array ('United States', 'Indonesia', 'Thailand', 'Australia', 'Germany', 'Japan');   
 And what you need to do before populating the state  option  in the code, you will have to check that states are defined in  state  The array for the selected  country  and whether you want them to enter the  state ["United States"]  and  state ["Indonesia"]  , You can use the  .hasOwnProperty ()  method to check whether the selected countries are present or not  State  in the form of a  key  in the array.  
  return (! State.hasOwnProperty (make)) return;

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