passing parameters from c 23 to js fucntions

1<!--First the html-->
2<script type="text/javascript"> 
3        function updateProgress(percentage) {          
4            document.getElementById('ProgressBar').style.width = percentage+"%";
5        }
6</script> 
7<!--Define your function or call it from a .js file-->
8<!--On the C# Code behind-->
9 string updateProgress = "18%";
10 ClientScript.RegisterStartupScript(this.GetType(), "updateProgress", "updateProgress('" + updateProgress + "');", true);
11<!--You can pass C# variables as parameters to the js function this way: '" + param + "'-->