基于JQUERY的多级联动代码_jquery

(function($){
$.fn.doselectmore = function(settings) {
var dfop ={
namekey: "name",
pnamekey: "name",
idkey: "id",
selectname:"sel",
method: "POST",
datatype: "json",
param:{},
pval:null,
chckval:null,
chckvalarry:null,
pname:false,
nname:false,
vl:0,
url: false,
data: false
};
$.extend(dfop, settings);
// alert(eobj(dfop));
var me = $(this);
if(!dfop.nname){
dfop.nname = (dfop.selectname+(dfop.vl+1));
}
if((!dfop.pname)&&dfop.vl>0){
dfop.pname = dfop.selectname+(dfop.vl-1);
}
if(!dfop.data){
if (dfop.url) {
var param = {};
$.ajax({
type: dfop.method,
url: dfop.url,
data: dfop.param,
dataType: dfop.datatype,
success: function(data){
dfop.data=data;
selectmorebuilder(me,dfop);
},
error:(function(request,status,err){
var errText = request.responseText;
var ErrMessage = "页面出现"+request.status+"错误信息， ";
ErrMessage += "错误内容为："+request.statusText+"\n"+errText.substring(errText.indexOf(""));
alert(ErrMessage);
})
});
}
}else{
selectmorebuilder(me,dfop);
}
function selectmorebuilder(thisme,df) {
if(df.chckval!=null&&df.chckvalarry==null){
var pid=df.chckval;
var k=1;
df.chckvalarry = new Array();
df.chckvalarry.push(pid);
while(k>0){
k=0;
$.each(df.data, function(i, item){
if(item[df.idkey]==pid&&item[df.pnamekey]!=df.pval){
pid=item[df.pnamekey];
df.chckvalarry.unshift(pid);
k++;
}
});
}
}
// alert(eobj(df.chckvalarry));
var select = $("");
select.attr({
name:df.selectname+dfop.vl,
id:df.selectname+dfop.vl,
nname:df.nname,
pname:df.pname,
vl:df.vl
});
var sdiv = null;
if (dfop.vl == 0) {
sdiv = $("");
thisme.after(sdiv).remove();
sdiv.append("");
sdiv.append(select);
sdiv.get(0).t=df;
}else{
thisme.removeselectmore();
sdiv = $("input[name="+df.selectname+"]").parent();
sdiv.append(select);
}
select.empty();
var counti = 0;
$.each(df.data, function(i, item){
if(item[df.pnamekey]==df.pval){
select.append(""+item[df.namekey]+"");
counti++;
}
});
if (counti == 0) {
select.remove();
}
else {
select.change(function(){
var nselect = $("#" + $(this).attr("nname"));
if (nselect.length == 0) {
nselect = $("");
sdiv.append(nselect);
}
nselect.doselectmore({
namekey: df.namekey,
pnamekey: df.pnamekey,
idkey: df.idkey,
selectname: df.selectname,
param: df.param,
pval: $(this).val(),
vl: df.vl + 1,
chckvalarry:sdiv.get(0).t.chckvalarry,
data: df.data
});
});
if(df.chckvalarry!=null){
if(df.chckvalarry.length>=df.vl)
select.val(df.chckvalarry[df.vl]);
}
if(df.vl==1&&df.chckvalarry!=null&&df.chckvalarry[1]!=select.val()){
var ddf = sdiv.get(0).t;
ddf.chckvalarry=null;
ddf.chckval=null;
sdiv.get(0).t=ddf;
}
select.change();
$("input[type=hidden][name="+df.selectname+"]").val($("input[type=hidden][name="+df.selectname+"]").getselectmoreval());
}
}
};
$.fn.getselectmoreval = function(){
var me = $(this);
if(me.size()==0) return;
var sdiv = me.parent();
if(sdiv.size()==0) return;
var df = sdiv.get(0).t;
var nselect = $("#" + df.selectname+df.vl);
var v = null;
while(nselect.size()>0){
v = nselect.val();
nselect = $("#" +nselect.attr("nname"));
}
return v;
};
$.fn.setselectmoreval = function(idv){
var me = $(this);
if(me.size()==0) return;
var sdiv = me.parent();
if(sdiv.size()==0) return;
var df = sdiv.get(0).t;
df.chckval=idv;
if(idv!=null){
var pid=df.chckval;
var k=1;
df.chckvalarry = new Array();
df.chckvalarry.push(pid);
while(k>0){
k=0;
$.each(df.data, function(i, item){
if(item[df.idkey]==pid&&item[df.pnamekey]!=df.pval){
pid=item[df.pnamekey];
df.chckvalarry.unshift(pid);
k++;
}
});
}
}
sdiv.get(0).t=df;
var nselect = $("#" + df.selectname+df.vl);
nselect.val(df.chckvalarry[0]);
nselect.change();
};
$.fn.removeselectmore = function(){
if($(this).attr("nname")!=null){
$("#"+$(this).attr("nname")).removeselectmore();
}
$(this).remove();
};
})(jQuery);















方法名:doselectmore

用途：实例化一个对象为多选框

例子:html

js:

方法名:doselectmore

用途：得到选中对象值

例子:js:

方法名:setselectmoreval(val)

用途：为多选框设置值

例子:js: