<input type="hidden" value="0" id="__EVENTTARGET" name="__EVENTTARGET" runat="server"/>
<input type="hidden" value="0" id="__EVENTARGUMENT" name="__EVENTARGUMENT" runat="server"/> 
//系统的postback方法
        function __doPostBack(eventTarget, eventArgument) { 
            var theform; 
            if (window.navigator.appName.toLowerCase().indexOf("netscape") > -1) { 
                theform = document.forms["form1"]; 
            } 
            else { 
                theform = document.forms[0]; 
            }
            if (!theform)
            {
                theform=document.forms[0];
            }
            theform.__EVENTTARGET.value = eventTarget.split("$").join(":"); //将$替换成:
            theform.__EVENTARGUMENT.value = eventArgument; 
            theform.submit(); 
        }