javascript - Assigning the value of the sender object to a variable -


i'm using several comboboxes have extract values , concatenate them in textbox. problem use sender.get_selecteditem().get_value(); extract data of each one, each 1 obtains data of combobox, variables acquire same value (it not keep values obtained in previous variable), using telerik controls.

<script type="text/javascript">      function cmp(sender, eventargs {          if (document.getelementbyid("ctl00_contentplaceholder_rgpartesrfq_ctl00_ctl05_planta")) {              var pl = sender.get_selecteditem().get_value();              var fo = sender.get_selecteditem().get_value();              var gr = sender.get_selecteditem().get_value();              var di = document.getelementbyid("ctl00_contentplaceholder_rgpartesrfq_ctl00_ctl05_txtdiam1").value;              var lo = document.getelementbyid("ctl00_contentplaceholder_rgpartesrfq_ctl00_ctl05_txtlongt").value;              var codemp = document.getelementbyid("ctl00_contentplaceholder_rgpartesrfq_ctl00_ctl05_txtcmp").value;              document.getelementbyid("ctl00_contentplaceholder_rgpartesrfq_ctl00_ctl05_txtcmp").value = "m" + pl + fo + gr + di + lo;         }          else if (document.getelementbyid("ctl00_contentplaceholder_rgpartesrfq_ctl00_ctl02_ctl04_planta").value !== null) {          }     }  </script>


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