如何处理web窗体的返回值.txt

C# 是创新性的新式编程语言

				var returnvalue;  
				returnvalue=window.showModalDialog('Frameset.asp?WebSortStart.aspx?setidFlag='+setidFlag,'','dialogHeight: 295px; dialogWidth: 376px;  edge: Raised; center: Yes; help: no; resizable: Yes; status: no;');
				debugger;
				window.returnValue=returnvalue;
				//葛利峰 2004-06-16 修改
				if((returnvalue=="")||(returnvalue==undefined))//取消或系统关闭按钮
					return;
				else//确定
					window.close();