<INPUT TYPE=checkbox ID=chk1 onclick="choosebox(this)">
<INPUT TYPE=text VALUE="" NAME="textbox" SIZE=15 disable>
<script>
function choosebox(echk)
{
if(echk.checked)
{
echk.nextSibling.disable=false;
echk.nextSibling.focus();
}
else
{
echk.nextSibling.value="";
echk.nextSibling.disable=true;
}
}
</script>
<INPUT TYPE=text VALUE="" NAME="textbox" SIZE=15 disable>
<script>
function choosebox(echk)
{
if(echk.checked)
{
echk.nextSibling.disable=false;
echk.nextSibling.focus();
}
else
{
echk.nextSibling.value="";
echk.nextSibling.disable=true;
}
}
</script>
<INPUT TYPE=text VALUE="" NAME="a" SIZE=15 disabled>
<script>
function cho()
{
if(chk1.checked)
{
a.disabled=false;
a.focus();
}
else
{a.disabled=true;
}
}
</script>
<head>
<title> New Document </title>
<meta name="Generator" content="EditPlus">
</head>
<body>
<input type="checkbox" id="chk_1" onClick="javascript:clickChk()" /><input type="text" id="txt_1" disabled="disabled" />
<br />
<input type="checkbox" id="chk_2" onClick="javascript:clickChk()" /><input type="text" id="txt_2" disabled="disabled" /><script language="javascript">
<!--
function clickChk() {
if (!document.getElementById('chk_1').checked) {
document.getElementById('txt_1').value = '';
}
if (!document.getElementById('chk_2').checked) {
document.getElementById('txt_2').value = '';
}
document.getElementById('txt_1').disabled = !document.getElementById('chk_1').checked;
document.getElementById('txt_2').disabled = !document.getElementById('chk_2').checked;
}
//-->
</script>
</body>
</html>