各位大虾帮帮忙，谢了！！

Question

<input id="in1" disabled><script>
in1.removeAttribute("disabled")
</script>

Answer 1

<form name="form1">
<input type="text" name="tx" disabled>  <input type="radio" name="r" onClick="this.form.tx.disabled=false">
</form>

Answer 2

<form name="form1">
<input type="text" name="tx" disabled>  <input type="radio" name="r" onClick="if(this.form.tx.disabled){this.form.tx.disabled=false}else{this.form.tx.disabled=true;this.checked=false}">
</form>

Answer 3

<Script Language="VBScript">
function funcclick(kk)
if kk=1 then
if document.domainvarsetup.check1.checked   then document.domainvarsetup.domainparseshort.readOnly=false document.domainvarsetup.domainparseshort.focus  
else
document.domainvarsetup.domainparseshort.readOnly=true end if
end if
end function
</script>
<input onclick="funcclick(1)" type="checkbox" value =1822854 name="check1">
<input readOnly type="text" size="30" name="domainparseshort" value=211.100.17.155 >我在万网上找到的