System.Text.StringBuilder sb = new System.Text.StringBuilder();
sb.Append(“if (typeof(Page_ClientValidate) == ‘function’) { “);
sb.Append(“if (Page_ClientValidate() == false) { return false; }} “);
sb.Append(“this.value = ‘Please Wait…’;”);
sb.Append(“this.disabled = true;”);
sb.Append(Page.GetPostBackEventReference(this.btnSaveTransaction));
sb.Append(“;”);

btnSaveTransaction.Attributes.Add(“onclick”, “javascript:if(confirm(‘Do you want to save this record?’)== false) return false;” + sb.ToString());