imediasun1,
<body>
<script>
window.onload = function () {
document.body.onclick = function (e) {
e = e || event;
target = e.target || e.srcElement;
if (target.tagName == "INPUT" && target.type == "radio") {
for (i = 0; i < document.getElementsByTagName("select").length; i++) {
document.getElementsByTagName("select")[i].style.display = "none";
}
} //alert(target.id.replace("rad"));
document.getElementById("sel"+target.id.replace("rad", "")).style.display = "block";
}
}
</script>
<label><input type="radio" id="rad1" name="rad_group">1</label><label><input type="radio" id="rad2" name="rad_group">2</label><label><input type="radio" id="rad3" name="rad_group">3</label>
<select id="sel1" style="display:none">
<option>1</option>
<option>2</option>
</select>
<select id="sel2" style="display:none">
<option>3</option>
<option>4</option>
</select>
<select id="sel3" style="display:none">
<option>5</option>
<option>6</option>
</select>
</body>
а на будущее...почитайте
учебник...
