javascript - function "buttons disabled" from beginning -


i have 3 radio buttons , 3 buttons each belong 1 radio button. want buttons enabled if according radio button checked.

my code works, if first click on radio button , start function. how can make function work, buttons disabled beginning?

the function looks 

$("input:radio[name=kartenthema]").change(function() {                if (this.value == "geburtenrate") {          $("#karte_id").attr('src', 'kantone_interaktiv_geburten.svg');          $("#legende_id").attr('src', 'legenden/geblegende.png');           $("input[name=button1]").attr("disabled", true);          $("input[name=button1]").addclass("disabledclass");          $("input[name=button2]").attr("disabled", false);          $("input[name=button2]:enabled").removeclass("disabledclass");          $("input[name=button3]").attr("disabled", true);          $("input[name=button3]:disabled").addclass("disabledclass");       } else if (this.value == "sterberate") {          $("#karte_id").attr('src', 'kantone_interaktiv_sterbe.svg');          $("#legende_id").attr('src', 'legenden/sterblegende.png');          $("input[name=button1]").attr("disabled", true);          $("input[name=button1]:disabled").addclass("disabledclass");          $("input[name=button2]").attr("disabled", true);          $("input[name=button2]:disabled").addclass("disabledclass");          $("input[name=button3]").attr("disabled", false);          $("input[name=button3]:enabled").removeclass("disabledclass");       } else if(this.value == "wanderung") {          $("#karte_id").attr('src', 'kantone_interaktiv_wanderung.svg');          $("#legende_id").attr('src', 'legenden/wandlegende.png');          $("input[name=button1]").attr("disabled", false);          $("input[name=button1]:enabled").removeclass("disabledclass");          $("input[name=button2]").attr("disabled", true);          $("input[name=button2]:disabled").addclass("disabledclass");          $("input[name=button3]").attr("disabled", true);          $("input[name=button3]:disabled").addclass("disabledclass")                                   }   }

and radio buttons / buttons this:

<embed id="legende_id" src="legenden/geblegende.png" width="180" height="230" style="margin-left:30px" type="image/png" /> <h3>   <input type="radio" class="radio" name="kartenthema" value="geburtenrate" checked="ckecked">geburtenziffer   <input type="button" class="button" name="button2" value="animation" onclick="location.href='animation_geburten.html'">     <h3>       <input type="radio" class="radio" name="kartenthema" value="sterberate">mortalität       <input type="button" disabled="disabled" class="button" name="button3" value="animation" onclick="location.href='animation_mortalität.html'">         <h3>           <input type="radio" class="radio" name="kartenthema" value="wanderung">interkantonale wanderung           <input type="button" class="button" name="button4" value="animation" onclick="location.href='animation_wanderung.html'">             <br>               <br>                 <input type="button" class="button" name="button1" value="kartogramm" onclick="location.href='kartogramm.html'" />               </br>             </br>           </input></input>         </h3>       </input></input>     </h3>   </input></input> </h3>

i know can put disabled after input type, style doesn't change enabled disabled.

  if (this.value == "geburtenrate") {

change line , next 2 similar lines this:

  if ($(this).val() == "geburtenrate") {

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