例如： ， " '

在文本框中输入？
可以有两个方法，一个是在输入后判断是否存在这些特殊字符
if (/[，"']/.test(strValue)>-1)
alert('输入了非法字符')
另一种是在按下按键时就检查
<script type="text/javascript">
function check(event) {
var e=window.event | event;
if (e.keyCode==xx) //xx为这几个非法字符的charCode代码，不知道的可以用alert(e.keyCode)检查下
{
return false
}
}
</script>
<input type="text" id="text" onkeypress="check()">

谢谢！！！但是我要的判断是从其他页面传过来的id的值。。。。

[此贴子已经被作者于2006-12-17 11:32:07编辑过]

那在服务器端，用vbscript的正则表达式检查，一样的

Function ReplaceBadWord(g_word)
g_word=Replace(g_word,"'","")
g_word=Replace(g_word," ","")
g_word=Replace(g_word,"&","")
g_word=Replace(g_word,"(","")
g_word=Replace(g_word,"\","")
g_word=Replace(g_word,"/","")
g_word=Replace(g_word,"..","")
g_word=Replace(g_word,"^","")
g_word=Replace(g_word,"#","")
g_word=Replace(g_word,"%","")
g_word=Replace(g_word,"|","")
g_word=Replace(g_word,";","")
g_word=Trim(Replace(g_word,")",""))
ReplaceBadWord=g_word
End Function
adminname=ReplaceBadWord(Request.form("username"))
这个是用ASP来控制特殊字符输入的。。。。。。。。。