dhtmlxCombo中的comboFilter方法
<div id="combo_province" class="txt9">
<script>
varcombo_province;
combo_province = new dhtmlXCombo("combo_province", "province", 142);
combo_province.enableFilteringMode(false);
combo_province.attachEvent("onKeyPressed", function(key){
//发起ajax请求
$.get("learn/province.htm", function(json){
if(comboFilter(key, json, "combo_province", "hp", true, false) == 0){
alert(1);
}
});
});
</script>

ajax请求返回的JSON属性有：nevalue,contents,inputcpy,inputcwb

我想问的是这个comboFilter方法具体是干什么的，以及参数代表的意义，谢谢~~~~~~~

[解决办法]
求知道啊