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

<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> <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>
[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]