(function(){
//select操作
$.fn.loadSelect = function(opt){
opt = $.extend({}, {
required:false,//为真则添加<option value="" selected="selected">required值</option>
nodata:null,//子级无数据时 select 的状态。可设置为："none"(display隐藏) | "hidden"(visibility隐藏) | 无
data:[],
loadCall:function(){}
}, opt);
var d = {}, callback = function(data, s){
var html = '';
$.each(data||[], function(i,n){
d = n.id ? n : {
id:i,
text:n
};
html += '<option value="'+d.id+'"'+((opt.def != undefined && (opt.def == d.id || opt.def == d.text)) ? ' selected="selected"' : '')+'>'+d.text+'</option>';
});
s.html(r+html);
(r || html) && s.trigger('change');
switch(opt.nodata){
case 'none':
html === '' ? s.hide() : s.show();
break;
case 'hidden':
s.css('visibility', html === '' ? 'hidden' : 'visible');
break;
}
$.isFunction(opt.loadCall) && opt.loadCall.call(s);
}, r = opt.required ? '<option value="">'+($.type(opt.required) == 'string' ? opt.required : '-请选择-')+'</option>' : '';
return this.each(function(){
var s = $(this);
if(s.is('select')){
if(typeof(opt.data) === 'string'){
s.empty();
$.getJSON(opt.data, function(json){
callback(json, s);
});
}else{
callback(opt.data, s);
}
}
});
},
//select联动
$.fn.linkage = function(opt){
opt = $.extend({}, {
build:true,//自动创建不存在的?
selects:['#city', '#area'],//子集select,按顺序,jquery选择器(.#)
seldef:[],//默认值,1以后和上项对应,可是id或者text
required:true,
nodata:'',
url:'/company/getCity.html?id={$id}',//子数据,string,{$id} or {$text}页码信息
data:[],//父级的数据
def:0//父级默认值
}, opt);
var mkSelect = function(i){
var n = child[i], nN = $(n);
if( i && n && opt.build && nN.length === 0 ){
var sn = n.substr(1), ci = n.substr(0, 1) == '#' ? 'id="'+sn+'"' : 'class="'+sn+'"';
nN = $(child[i-1]).after('<select name="'+sn+'" '+ci+'></select>').next();
} !nN.data('linkage') && nN.change(function(){
mkSelect(i+1).loadSelect({
data: this.value ? opt.url.sprintf({
id: this.value,
text: this.selectedIndex >= 0 ? this.options[this.selectedIndex].text : ''
}) : [],
nodata:opt.nodata,
required:opt.required,
def:opt.seldef[i]||''
});
}).data('linkage', true); return nN;
}, child = opt.selects||[];
child.unshift(this);
var s = mkSelect(0);
opt.data.length && s.loadSelect({
data:opt.data,
def:opt.def
});
return this;
},
//jquery.printf
String.prototype.sprintf = function(data, def) {
return this.replace(/(?:\{\$)([\w\d\-\_]+)(?:\})/g, function() {
return data[arguments[1]]||def||'';
});
}
});
示例:
<div class="jumbotron">
<h1>联动测试</h1>
<select name="" id="addr_prv"></select>
</div>
<script type="text/javascript">
In.ready(function(){
$('#addr_prv').linkage({data:'/company/getCity.html',seldef:[37,567]});
});
</script>
