为什么提交为空

[jellday]

<script language="javascript">
function huntype() {
    document.getElementById("letype").style.display = "none";
document.getElementsByName("cpurpse").value="求租";
}
function letype() {
    document.getElementById("letype").style.display = "";
}
</script>
<dl><dt class="req">发布类型：</dt><dd class="nobdr"><label><input type="radio" name="ctype" onclick="huntype()" />求租</label><label><input type="radio"  name="ctype" onclick="letype()" />出租</label></dd>
<span id="letype" style="display:none;"><dt class="req">具体意向：</dt><dd class="nobdr"><input name="cpurpose" type="radio" value="出租">出租<input name="cpurpose" type="radio" value="转让">转让<input name="cpurpose" type="radio" value="出租/出让">出租/出让</dd></span></dl>

为什么我这样提交出来的内容要么意向那里空白, 要么就是选过的出租类. 为什么? 难道js哪里提交不到去? 怎么解决呢?

我的意思就是如果选求租, 那么意向那里自动是求租, 不要选. 如果选出租, 才要选具体意向

[chenyifei211]

<script language="javascript">
function huntype() {
    document.getElementById("letype").style.display = "";
    document.getElementById("qiuzu").style.display = "";
    document.getElementById("chuzu").style.display = "none";
}
function letype() {
    document.getElementById("letype").style.display = "";
    document.getElementById("qiuzu").style.display = "none";
    document.getElementById("chuzu").style.display = "";
}
</script>
<dl>
<dt class="req">发布类型：</dt>
<dd class="nobdr">
<label><input type="radio" name="ctype" onclick="huntype()" />求租</label>
<label><input type="radio"  name="ctype" onclick="letype()" />出租</label>
</dd>
<span id="letype" style="display:none;">
<dt class="req">具体意向：</dt>
<dd class="nobdr">
<span id="chuzu" style="display:none;">
<input name="cpurpose" type="radio" value="出租">出租
<input name="cpurpose" type="radio" value="转让">转让
<input name="cpurpose" type="radio" value="出租/出让">出租/出让
</span>
<span id="qiuzu" style="display:none;">
<input name="cpurpose" type="radio" value="出租">求租
</span>
</dd>
</span>
</dl>

[vvkl]

<script language="javascript">
function huntype() {
    document.getElementById("letype").style.display = "none";
    document.getElementById("cpurpose_hun").checked=true;
}
function letype() {
    document.getElementById("letype").style.display = "";
    document.getElementById("cpurpose_hun").checked=false;	
}
</script>
<input name="cpurpose" id="cpurpose_hun" type="radio" value="求租" style="display:none">
<dl><dt class="req">发布类型：</dt><dd class="nobdr"><label><input type="radio" name="ctype" onclick="huntype()" />求租</label><label><input type="radio"  name="ctype" onclick="letype()" />出租</label></dd>

<span id="letype" style="display:none;"><dt class="req">具体意向：</dt><dd class="nobdr"><input name="cpurpose" type="radio" value="出租">出租<input name="cpurpose" type="radio" value="转让">转让<input name="cpurpose" type="radio" value="出租/出让">出租/出让</dd></span></dl>
<input type="submit" />