问一个控件禁用/启用的问题.

Question

比如有1个TEXTBOX1,和一组RadioButton,当我TextBox1里输入为"1"时,RadioButton为可用,不填或者其他值时为不可用,请问怎么实现?  JS吗?

Answer 1

TextBox1中onpropertychange="setRadioButtonDisplay()"function setRadioButtonDisplay()
{
    document.getElementById('<%=RaidoButton1.ClientID %>').disabled = false;
}

Answer 2

<script type="text/javascript">
        function textChange(obj) {        
            var a = document.getElementById("RadioButton1");
            if (event.keyCode == 49) {                
                a.setAttribute("disabled", "disabled");
            }
            else {
                a.removeAttribute("disabled");
            }
        }
</script><asp:TextBox ID="TextBox1" runat="server" onkeypress="textChange(this)"></asp:TextBox>
<asp:RadioButton ID="RadioButton1" runat="server" Text="RadioButton1"/>

Answer 3

反了   ......event.keyCode != 49

Answer 4

<asp:TextBox ID="TextBox1" runat="server" onkeypress="textChange(this)"></asp:TextBox>
<asp:RadioButton ID="RadioButton1" runat="server" Text="RadioButton1"/>
<script type="text/javascript">
        function textChange(obj) {        
            var a = document.getElementById("RadioButton1");
            if (event.keyCode !=49) {                
                a.setAttribute("disabled", "disabled");
            }
            else {
                a.removeAttribute("disabled");
            }
        }
</script>

Answer 5

那事件就要用onchange了，然后
var b=.getElementById("TextBox1");
if(b.value=="哈哈")
{
    ......
}