javascript - How to keep a variables value outside of the function? -

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i have following 2 functions take input drop down menu using onchange

  <script>   current_fin = "none";  current_mat = "pine";    // pass current selection variable use. function getmaterial() {     var mat = document.getelementbyid("dropdownone");     var current_mat = mat.options[mat.selectedindex].text; $("#price").html("material is: " + current_mat  + "<br/>" +"finish is: " + current_fin); } function getfinish() {     var fin = document.getelementbyid("dropdowntwo");      var current_fin = fin.options[fin.selectedindex].text; $("#price").html("material is: " + current_mat  + "<br/>" +"finish is: " + current_fin); } </script>

all write value of selected div #price. problem arises when change 1 , other. if switch between 2 boxes variables revert default value none , pine. want them retain value outside of function, if switch box 1 oak stays until switch back. have feeling have scope problems here don't know how proceed. i'll include html reference.

<select name="material" id="dropdownone" onchange="getmaterial()">   <option>pine</option>   <option>oak</option>   <option>walnut</option>   <option>plastic</option> </select>  <select name="finish" id="dropdowntwo" onchange="getfinish()">   <option>none</option>   <option>finished</option> </select>  <input type="submit" value="submit cart">   <div id=price>  </div> 

<script>          var current_fin = "none";      var current_mat = "pine";          // pass current selection variable use.     function getmaterial()     {         var mat = document.getelementbyid("dropdownone");         current_mat = mat.options[mat.selectedindex].text;         $("#price").html("material is: " + current_mat  + "<br/>" +"finish is: " + current_fin);     }      function getfinish()     {         var fin = document.getelementbyid("dropdowntwo");          current_fin = fin.options[fin.selectedindex].text;         $("#price").html("material is: " + current_mat  + "<br/>" +"finish is: " + current_fin);     }

when write var current_mat inside function, overrides global current_mat.


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