模拟弹出菜单的代码

点“为自己付费”按钮之后弹出一个模态化div，点确定按钮之后，表格增加一行记录；同理，点“为他人付费”按钮也增加另外一行记录。可是在IE6、IE7下可以，FF下不行，请问可有办法呢？

<！DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>支付中心-填写资料</title> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <style type="text/css"> #testa,#testa2 { width:100%; } #lockform,#lockform2 { position:absolute; width:expression（this.parentNode.scrollWidth）; top:expression（this.parentNode.scrollTop）;left:0; height:100%; right:0; bottom:0; z-index:1; background:gray; filter:alpha（opacity=92）; } #main,#main2 { width:400px; position:absolute; left:expression（this.parentNode.scrollWidth/2-200）;top:100px; background:#efefef; text-align:left; filter:Alpha（opacity=100）; } #InfoHead,#InfoHead2 { text-align:right; padding:3px 0 1px 3px; border:1px solid #f90; background:url（../images/lockform_title.gif） repeat-x; color:#36f; cursor:move; } #InfoHead a:link,#InfoHead a:visited,#InfoHead2 a:link,#InfoHead2 a:visited { font-size:14px; font-weight:bold; padding:0 3px; } #InfoBody,#InfoBody2 { border:4px double #f90; border-top:none; padding:2px; } #InfoContent { height:200px; padding:6px; overflow:auto; word-break:break-all; }#InfoContent2 { height:297px; padding:6px; overflow:auto; word-break:break-all; }</style> <script type="text/javascript"></script> </head> <body><form name="Form1"><table class="width_660"> <tr> <td class="activate_title"><img src="images/li.gif" alt="" /> 填写资料</td> </tr> <tr> <td class="height_28"> </td> </tr> </table> <img src="images/pay_banner.gif"><strong>购 物 车</strong><table class="data_table" id="pay_table"> <tr class="data_table_tr1"> <td>商品名称</td> <td>单价（会员）</td> <td>数量</td> <td>总价</td> <td>付费类型</td> <td>删除</td> </tr> </table> <table class="data_table"> <tr> <td class="align_center">购物车里有商品：<span class="red">2</span> 件 总数：<span class="red">10</span> 件 共计：<span class="red">75</span> 元 您有预存款：<span class="red">120</span> 元 </td> </tr> </table> <input type="button" value="为自己付费" class="ncss" onclick="showmain（）;"> <input type="button" value="为他人付费" class="ncss" onclick="showmain2（）;"> <input type="button" value=" 清空购物车 " class="ncss" onclick="self.location="pay2.html""> <input type="button" value=" 去收银台 " class="ncss2" onclick="self.location="pay3.html"">您现在可以：返回主页 下载使用说明书 安全退出</form><img src="images/lockform_close.gif" title="关闭" /><table class="data_table4"> <tr> <td class="data_table4_tr2">年费套餐：</td> <td class="data_table4_tr1"><input type="text" class="input_width input_bian"></td> </tr> <tr> <td class="data_table4_tr2">数量：</td> <td class="data_table4_tr1"><input type="text" class="input_width input_bian"></td> </tr> </table><table class="data_table4"> <tr> <td class="data_table4_tr3"></td> <td class="data_table4_tr1"><input type="button" value=" 确 定 " class="ncss" onclick="add_oneself（）;InfoClose（）;unlock（lockform）;"> <input type="reset" value=" 取 消 " class="ncss" onclick="InfoClose（）;unlock（lockform）;"> </td> </tr> </table> <img src="images/lockform_close.gif" title="关闭" /><table class="data_table4"> <tr> <td class="data_table4_tr2">EMAIL地址：</td> <td class="data_table4_tr1"><input type="text" class="input_width input_bian"> <input type="button" value="→检验用户" class="ncss2" style="width:78px;height:21px; padding:0;"></td> </tr> <tr> <td class="data_table4_tr2">年费套餐：</td> <td class="data_table4_tr1"><input type="text" class="input_width input_bian"></td> </tr> <tr> <td class="data_table4_tr2">数量：</td> <td class="data_table4_tr1"><input type="text" class="input_width input_bian"></td> </tr> <tr> <td class="data_table4_tr2">姓名：</td> <td class="data_table4_tr1">西门吹雪</td> </tr> <tr> <td class="data_table4_tr2">邮编：</td> <td class="data_table4_tr1">200083</td> </tr> <tr> <td class="data_table4_tr2">地址：</td> <td class="data_table4_tr1">某某省某某市某某路某某号</td> </tr> <tr> <td class="data_table4_tr2">邮箱：</td> <td class="data_table4_tr1">888@163.com</td> </tr> </table><table class="data_table4"> <tr> <td class="data_table4_tr3"></td> <td class="data_table4_tr1"><input type="button" value=" 确 定 " class="ncss" onclick="add_others（）;InfoClose2（）;unlock2（lockform2）;"> <input type="reset" value=" 取 消 " class="ncss" onclick="InfoClose2（）;unlock2（lockform2）;"> </td> </tr> </table> </body> </html>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]