一个快速添加标签的小玩意，但在FF下不能用，望高手指点_表单特效

初步判断是obj.style.backgroundColor在FF下返回的是rgb(xxx,xxx,xxx)的缘故。偶是新手，代码很菜，高手勿笑啊

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Untitled Document</title> <style type="text/css"> a.blue:link,a.blue:visited{     font-size: 12px;     color: #69c;     text-decoration: none; } a.blue:hover{     background: #69c;     color: #fff; } </style> <script type="text/javascript"> function fInsert(a,b){     oInput = document.getElementById(a);     oItm = b;     if(b.style.backgroundColor == "#69c"){         sReplace = oItm.innerHTML.concat(" ");     oInput.value = oInput.value.replace(sReplace,"");     b.style.backgroundColor = "";     b.style.color = "";     }     else{     oInput.value = oInput.value.concat(oItm.innerHTML);     oInput.value = oInput.value.concat(" ");     b.style.backgroundColor = "#69c";     b.style.color = "#fff";     } } </script> </head> <body> <input type="text" id="cc" style=" width: 300px;" /> <a href="javascript:void(0);" class="blue" onclick="fInsert('cc',this);">关键字</a>　<a href="javascript:void(0);" class="blue" onclick="fInsert('cc',this);">关键字2</a>　<a href="javascript:void(0);" class="blue" onclick="fInsert('cc',this);">关键字3</a> </body> </html>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

一个快速添加标签的小玩意，但在FF下不能用，望高手指点_表单特效_