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                url: "WebService.asmx/IsRegistered", 
                type: "POST", 
                contentType: "application/json; charset=utf-8",
                dataType: "json", 
                data:{_siteName:$('#tbSiteName').val(),_siteURL:$('#tbSiteURL').val()},
                success: function(json) {
              if(json.d=="true")
                {
                alert("ok");
                }
                }
            });  });
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