緊急求助!!!!!!!!!!!!!!!!!

<% 
int index = 0;
        for(int i=0; i<10;i++) { String x = index +"";
String y = (index+1)+"";
    %>
    <tr>
        <td align="Center" bgcolor="#EFEFEF" height="20" width="116" >
            <html:text property="employeeIdCol" size = "8" value = "" onchange = "__doPostBack('method','<%=x%>','')"/>
            <img border="0" src="<%=image%>Help_Down.gif" style="cursor:'hand'" height="23" width="20" onclick="btnPersonnelData_Click(this)">        </td>
        <td align="left"  bgcolor="#EFEFEF" height="20" width="104"></td>
        <td  align="left" bgcolor="#EFEFEF" height="20" width="222" >
            <font size ="2">
                <html:text property="jobTitleIdCol"  size = "8" value = ""/>
            </font>
            <font size ="2">
                <img border="0" src="<%=image%>Help_Down.gif"  style="cursor:'hand'" height="23" width="20"  onClick="callBtnJobTitle_Click(this)"/>
            </font>
            <font size ="2">
            </font>
        </td> 
    </tr>    <%
    
     index ++;
        }
    %>__doPostBack()为一个脚本方法,为什么我得不到x的值,而是取到的<%=x%>字符串,  哥哥姐姐们帮忙了!!!!