ASP.NET呼び出しjavascriptにおけるResponse.WriteとClientScript.Register Startup Scriptの違い

 
  
StringBuilder sb = new StringBuilder(); 
  
sb.Append(""); 
  <br>sb.Append("alert(document.forms.length);"); 
  <br>sb.Append(""); 
  
 
  
Response.Write(sb.ToString()); 
  
ClientScript.RegisterStartupScript(this.GetType(), "test", sb.ToString());