<select name="WyType">
<option>选择类型</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
<option value="6">6</option>
</select><select name="WyType">
<option>选择类型</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
<option value="6">6</option>
</select>
假设有2个下拉,如何判断已经被选的不能在选择
<option>选择类型</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
<option value="6">6</option>
</select><select name="WyType">
<option>选择类型</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
<option value="6">6</option>
</select>
假设有2个下拉,如何判断已经被选的不能在选择
<option value=0>选择类型</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
<option value="6">6</option>
</select><select name="WyType" id='WyType'>
<option value=0>选择类型</option>
</select>
<script type="text/javascript">
function setOption(obj){
var WyType=document.getElementById("WyType");
WyType.options.length=1;
if(obj.value==0)return;
for(var i=1;i<obj.options.length;i++)
{
if(i!=obj.value){
WyType.options.add(new Option(i,i));
}
}
WyType.value=0;
}
</script>
window.onload = function(){
var sels = document.getElementsByName("WyType");
var len = sels.length;
for(var i=0; i<len; i++){
sels[i].id = i;
sels[i].onchange = function(){
var val = parseInt(this.value);
sels[1-this.id].options[val].disabled = true;
};
}
};
window.onload = function(){
var sels = document.getElementsByName("WyType");
var len = sels.length;
for(var i=0; i<len; i++){
sels[i].id = i;
sels[i].onchange = function(){
var val = parseInt(this.value);
for(var j=0,olen = this.length; j<olen; j++){
this.options[j].disabled = false;
sels[1-this.id].options[j].disabled = false;
}
sels[1-this.id].options[val].disabled = true;
};
}
};