javascript脚本中的语句或变量什么时候用<%%>,什么时候不用

[lianyi_1999]

这几天都反死了，有的时候加上不对，有的时候不加又不队，大家随便帮我看下这个：

以下是我写的函数，所定义的total记录符合条件的记录数，但后面的
strHTML = strHTML + "<tr height = '50'><td colspan ='6' width='770' bgcolor='#E3E3E3'>"+"<font size='-1'>"+"  分页显示: 第1页/总<%=pagenum%>页 | 总<%=total%>个记录 | 首页 | 上页 | 下页 | 尾页    转到   "+"<select name='Page' onchange=''>"+"</select></tr></td>"
中的<%=total%>却总是显示不出来。但使用document.write(total)发现值是正确的，真不知道怎么回事


function changelocation2(id)
{
var Id = id;
var i;
var strHTML;
var sum=0;
var total=0; <!--符合条件的记录数-->


flag=false;

document.all.d1.innerHTML = "";
strHTML = "<center><table>"
for (i=0;i<counter_product;i++)
if (arr_product[i][1] == id)
sum = sum+1;

if (sum>0)
{ strHTML = strHTML + "<tr ><td width='25'>"+"<input type='checkbox' name='major_checkbox' value='0' onClick='select_ok()'>"+"</tr></td>"
strHTML = strHTML + "<td width='257'>" +"<font size='-1'>"+ "产品名称" + "</font></td>"
strHTML = strHTML + "<td width='207'>" +"<font size='-1'>"+ "型号" + "</font></td>"
strHTML = strHTML + "<td width='157'>" +"<font size='-1'>"+ "类别" + "</font></td>"
strHTML = strHTML + "<td width='49'>" +"<font size='-1'>"+ "促销" + "</font></td>"
strHTML = strHTML + "<td width='49'>" +"<font size='-1'>"+ "重点"+ "</font></td>"

for (i=0;i<counter_product;i++)
{
if (arr_product[i][1] == id)
{ if (arr_product[i][3] =="True")
arr_product[i][3] = "√"
else arr_product[i][3] = ""

if (arr_product[i][4] =="True")
arr_product[i][4] = "√"
else arr_product[i][4] = ""

strHTML = strHTML + "<tr><td width='25'>"+"<input type='checkbox' name='checkbox' value='0'>"+"</tr></td>"
strHTML = strHTML + "<td width='257'>" +"<font size='-1'>"+ arr_product[i][0] + "</font></td>"
strHTML = strHTML + "<td width='207'>" +"<font size='-1'>"+ arr_product[i][2] + "</font></td>"
strHTML = strHTML + "<td width='157'>" +"<font size='-1'>"+ arr_product[i][1]+ "</font></td>"
strHTML = strHTML + "<td width='49'>" +"<font size='-1'>"+ arr_product[i][3] + "</font></td>"
strHTML = strHTML + "<td width='49'>" +"<font size='-1'>"+ arr_product[i][4] + "</font></td>"
}
}
}
total=sum;
var pagenum = total/pagesize;

strHTML = strHTML + "<tr height='50'><td colspan='2'>" +"<div align='center'>"+"<font size='-1'>"+ "<input type='submit' name='update' value=' 修改 '> "+ "</div></font></tr></td>"
strHTML = strHTML + "<td >" +"<font size='-1'>"+ "<input type='submit' name='delete' value=' 删除 '> "+ "</font></td>"
strHTML = strHTML + "<td >" +"<font size='-1'>"+ "<input type='submit' name='select_cancle' value=' 全选 ' onClick='select_ok(document.all.major_checkbox.checked)'> "+ "</font></td>"
strHTML = strHTML + "<tr height = '50'><td colspan ='6' width='770' bgcolor='#E3E3E3'>"+"<font size='-1'>"+"  分页显示: 第1页/总<%=pagenum%>页 | 总<%=total%>个记录 | 首页 | 上页 | 下页 | 尾页    转到   "+"<select name='Page' onchange=''>"+"</select></tr></td>"

strHTML = strHTML + "</table></center>"
document.all.d1.innerHTML = strHTML;
document.all.select_cancle.value=" 全选 ";