1.if(radio5.checked == true)
text.value=radio5.value;
2.<input name="text" onclick="document.getElementById(radio5).checked = true;">
text.value=radio5.value;
2.<input name="text" onclick="document.getElementById(radio5).checked = true;">
<input type="radio" name="r" value="1" onclick="mytext.disabled=checked?'disabled':'';"/>
1
<input type="radio" name="r" value="2" onclick="mytext.disabled=checked?'disabled':'';"/>
2
<input type="radio" name="r" value="3" onclick="mytext.disabled=checked?'disabled':'';"/>
3
<input type="radio" name="r" value="4" onclick="mytext.disabled=checked?'disabled':'';"/>
4
<input type="radio" name="r" value="5" id="r5" onclick="mytext.disabled=checked?'':'disabled';"/>
<input type="text" name="mytext" onclick="document.getElementById('r5').checked=true;" disabled="disabled"/>
</form>