How to call a C# function from javascript? -

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i want call csharpfunction code behind javascript. tried code below. problem whether condition true or false, compiler call csharpfunction anyway! how can control that?

javascript code:

if (javascriptcondition > 0) {    <%csharpfunction();%> }

c# code behind:

protected void csharpfunction() {   // notification.show(); }

thanks help!

you can use web method , ajax 

   <script type="text/javascript">             //default.aspx        function deletekartitems() {                       $.ajax({                  type: "post",                  url: 'default.aspx/deleteitem',                  data: "",                  contenttype: "application/json; charset=utf-8",                  datatype: "json",                  success: function (msg) {                      $("#divresult").html("success");                  },                  error: function (e) {                      $("#divresult").html("something wrong.");                  }              });          } 

  [webmethod]                                 //default.aspx.cs   public static void deleteitem()   {      //your logic   }

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