modifying this code to do a redirect instead of opening up a new screen

Dear all;
I have the following syntax below which i am trying to modify
 
string url = "sap.aspx?traceid=" + lblone.Text; StringBuilder script = new StringBuilder(); script.Append("<script type=\"text/javascript\">"); script.Append("window.open('"); //used to open a new window script.Append(url); script.Append("');</script>"); Page.RegisterStartupScript("WinOpenPostback", script.ToString());  
which I would like to modify so that it doesnt open up a new page or window, instead it does a simple page redirect..how can this be done. All help is appreciated. Thank you
...