基于JQUERY的多级联动代码

jquery.select.more.js

(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，\n"; 
ErrMessage += "错误内容为："+request.statusText+"\n"+errText.substring(errText.indexOf("<pre>")+5,errText.indexOf("</pre>")); 
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></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 = $("<div></div>"); 
thisme.after(sdiv).remove(); 
sdiv.append("<input type=\"hidden\" name=\"" + df.selectname + "\">"); 
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("<option value='"+item[df.idkey]+"'>"+item[df.namekey]+"</option>"); 
counti++; 
} 
}); 
if (counti == 0) { 
select.remove(); 
} 
else { 
select.change(function(){ 
var nselect = $("#" + $(this).attr("nname")); 
if (nselect.length == 0) { 
nselect = $("<select></select>"); 
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);

help.html

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 
<html> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 
<script src="../../common.js" type="text/javascript"></script> 
<script src="../../jquery/jquery-1.3.2.min.js" type="text/javascript"/></script> 
<link type="text/css" rel="stylesheet" href="../SyntaxHighlighter/Styles/SyntaxHighlighter.css"></link> 
<script language="javascript" src="../SyntaxHighlighter/Scripts/shCore.js"></script> 
<script language="javascript" src="../SyntaxHighlighter/Scripts/shBrushJScript.js"></script> 
<script language="javascript" src="../SyntaxHighlighter/Scripts/shBrushXml.js"></script> 
<script type="text/javascript"> 
$(document).ready(function(){ 
dp.SyntaxHighlighter.ClipboardSwf = '../SyntaxHighlighter/Scripts/clipboard.swf'; 
dp.SyntaxHighlighter.HighlightAll('code'); 
}); 
</script> 
<title>Insert title here</title> 
</head> 
<body> 
<b>方法名:</b>doselectmore<br/> 
<b>用途：</b>实例化一个对象为多选框<br/> 
<b>例子:</b>html 
<pre name="code" class="html"> 
<!--head--> 
<script src="jquery.select.more.js" type="text/javascript"/></script> 
<!--body--> 
<input type="text" name="illegbasinfo"> 
</pre> 
js: 
<pre name="code" class="js"> 
/** 
一下※为必填项,★为二选一,?为不是必须 
※namekey: 数据类型显示名称, 
※pnamekey: 数据上级主键名称, 
※idkey: 数据主键名称, 
※selectname: 选择框名称, 
※pval:第一级别上级节点值, 
?chckval:默认选择, 
★url: false, 
?param:url使用时传入参数, 
★data: false 
**/ 
$("input[name=illegbasinfo]").doselectmore({ 
url:'../../../abc/dic/illbasinfo/loadall.do', 
pval:0, 
namekey: "illegbasinfo", 
pnamekey: "parillegbasid", 
idkey: "illegbasinfoid", 
selectname:"illegbasinfo" 
}); 
</pre> 
<b>方法名:</b>doselectmore<br/> 
<b>用途：</b>得到选中对象值<br/> 
<b>例子:</b>js: 
<pre name="code" class="js"> 
$("input[name=test1]").click(function(){ 
alert($("input[name=illegbasinfo]").getselectmoreval()); 
}); 
</pre> 
<b>方法名:</b>setselectmoreval(val)<br/> 
<b>用途：</b>为多选框设置值<br/> 
<b>例子:</b>js: 
<pre name="code" class="js"> 
$("input[name=test2]").click(function(){ 
$("input[name=illegbasinfo]").setselectmoreval(347); 
}); 
</pre> 
</body> 
</html>