if(!Page.IsPostBack) 
{ 
System.Text.StringBuilder s = new System.Text.StringBuilder(); 
s.Append("a();"); 
s.Append(this.GetPostBackEventReference(this.Button1)); 
this.Button1.Attributes.Add("onclick",s.ToString()); 
} 
a() 是 JS 
function a() 
{ 
var ok=document.getElementById('Button1'); 
ok.disabled = true; 
return true; 
} 


//csharp/6007