javascript - A potentially dangerous Request.Form value was detected from the client (ctl00$cphMain$txCourseDescription="...ace="'MS Sans Serif&#...") -


my screen has telrik rad popup populate on button click(btncoursedescription). have taken label show html formated data , textbox work code behind file. when click on btncoursedescription; telrik's popup opens , and after submit shows data on label , assign value textbox using javascript ... here javascript code...

<script type="text/javascript">         function clientshow(sender, eventargs)         {             //$find();             var txtinput = document.getelementbyid("<%=lbcoursedescription.clientid%>");             sender.argument = txtinput.innerhtml;         }          function clientclose(sender, args)         {             if (args.get_argument() != null)             {                 var lbinput = document.getelementbyid("<%=lbcoursedescription.clientid%>");                 var txtinput = document.getelementbyid("<%=txcoursedescription.clientid%>");                 lbinput.innerhtml = args.get_argument();                 txtinput.value = args.get_argument.htmlencode();              }         }     </script>

now when click on btncoursedescription , and assign value using popup data submits when want update other field means not updating html formatted data, harderror occurs:

a potentially dangerous request.form value detected client (ctl00$cphmain$txcoursedescription="...ace="'ms sans serif&#...").

please suggest me should do?


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