if(this.selectedIndex==-1) return;
var s1_curr_val = this.options[this.selectedIndex].value;
$.each(threeSelectData,function(k,v){
if(s1_curr_val==v.val){
if(v.items){
$.each(v.items,function(k,v){
appendOptionTo($s2,k,v.val,v2);
});
}
}
});
if($s2[0].options.length==0){appendOptionTo($s2,"...","",v2);}
$s2.change();
}).change();
$s2.change(function(){
$s3.html("");
var s1_curr_val = $s1[0].options[$s1[0].selectedIndex].value;
if(this.selectedIndex==-1) return;
var s2_curr_val = this.options[this.selectedIndex].value;
$.each(threeSelectData,function(k,v){
if(s1_curr_val==v.val){
if(v.items){
$.each(v.items,function(k,v){
if(s2_curr_val==v.val){
$.each(v.items,function(k,v){
appendOptionTo($s3,k,v,v3);
});
}
});
if($s3[0].options.length==0){appendOptionTo($s3,"...","",v3);}
}
}
});
}).change();
function appendOptionTo($o,k,v,d){
var $opt=$("<option>").text(k).val(v);
if(v==d){$opt.attr("selected", "selected")}
$opt.appendTo($o);
}
}
</script>
<style type="text/css" media="screen">
select{width:80px;}
</style>
<select id="Select1" name="Select1"></select>
<select id="Select2" name="Select2"></select>
<select id="Select3" name="Select3"></select>
文字没有详细整理！懂点JS的就能看懂！
代码打包下载
