单选框复选框或者按纽 变灰啊

document.all[ "控件ID "].disabled = true; --变成不可用
document.all[ "控件ID "].disabled = false; --变成可用

form.name.disabled = true

<INPUT TYPE= "text " ID= "aa ">
<INPUT TYPE= "radio " id= "bb ">
<INPUT TYPE= "button " value= "变灰 " name=button onclick= "javascript:aa.disabled=true;bb.disabled=true; ">
<INPUT TYPE= "button " value= "变亮 " name=button onclick= "javascript:aa.disabled=false;bb.disabled=false; ">

<form method="POST" action="" name="form1">
<input type="Submit" class="aaa" value=" 提 交 " name="B1" ID="B1" disabled><br>
<input type="checkbox" name="C1" value="ON" onclick="aaa(this.checked)">
</form>
<script language="javascript">
function aaa(object) {
if(object) {
document.form1.B1.disabled=false;
}else{
document.form1.B1.disabled=true;
}
}
</script>