下拉框中的复选框
<html>
<head>
<title>中国站长天空-网页特效-表单特效-下拉框中的复选框</title>
<meta http-equiv="content-type" content="text/html;charset=gb2312">
<!--把下面代码加到<head>与</head>之间-->
<style type="text/css">
body,td{font-size:12px;color:#000000;}
.checkbox{width:15px;height:15px;}
.cked{margin:1px;padding:2px;width:98%;display:block;background-color:highlight;color:highlighttext;}
.nock{margin:1px;padding:2px;width:98%;display:block;}
</style>
</head>
<body>
<!--把下面代码加到<body>与</body>之间-->
<script language="javascript">
<!--
function HtmlEncode(text){
?return text.replace(/&/g, '&').replace(/\"/g, '"').replace(/</g, '<').replace(/>/g, '>');
}
function _checkbox(name,str,defv){
?//haiwa@2005-8-17
?//http://www.51windows.net
?var arr=str.split("^");
?var ck="",bc="";
?for(var i=0;i<arr.length;i++){
??var thisarr=arr[i].split("@=");
??if (thisarr[0].length>0){
???var t=(thisarr.length==2)?thisarr[0]:arr[i];
???var v=(thisarr.length==2)?thisarr[1]:arr[i];
???if((","+HtmlEncode(defv).toLowerCase()+",").replace(/ ,/g, ',').indexOf(","+v+",")!=-1){ck=" checked";cls="cked";}
???else{ck="";cls="nock";}
???var thisstr="<label class=\""+cls+"\" for=\"i_"+name+"_"+i+"\" id=\"l_"+name+"_"+i+"\">";
???thisstr+="<input class=\"checkbox\" onpropertychange=\"document.getElementById('l_"+name+"_"+i+"').className=(document.getElementById('i_"+name+"_"+i+"').checked)?'cked':'nock';\" onclick=\"document.getElementById('l_"+name+"_"+i+"').className=(document.getElementById('i_"+name+"_"+i+"').checked)?'cked':'nock';\" type=\"checkbox\""+ck+" name=\""+name+"\" id=\"i_"+name+"_"+i+"\" value=\""+HtmlEncode(v)+"\" \/> ";
???thisstr+=HtmlEncode(t)+"</label>";
???document.write(thisstr);
??}
?}
}
function _getv(o){
?var allvalue="";
?if(typeof(o)=="undefined"){return "";}
?if (typeof(o.length)=="undefined"){
??if(o.checked){return o.value+ ",";}else{return "";}
?}
?for(var i=0;i<o.length;i++){
??if(o[i].checked){
???allvalue +=o[i].value+",";
??}
?}
?return allvalue;
}
function _setv(o,defv){
?var allvalue=(","+HtmlEncode(defv).toLowerCase()+",").replace(/ ,/g, ',');
?for(var i=0;i<o.length;i++){
??var v = o[i].value;
??o[i].checked=(allvalue.indexOf(","+v+",")!=-1)
?}
?return allvalue;
}
function _sl(o,b){
?for(var i=0;i<o.length;i++){
??o[i].checked = b
??//if(o[i].checked!=b){o[i].click();}
?}
}
//-->
</script>
<form method="post" name="myform" action="?">
? <table border="0" width="200">
??? <tr>
????? <td><div style="width:180px;height:150px;overflow:auto;border: 2px inset #FFFFFF;">
<script language="javascript">
<!--
_checkbox("city","北京^河北^黑龙江^河南^江西^辽宁^宁夏^四川^天津^浙江^香港","北京,山东")
//-->
</script>
?? </div></td>
??? </tr>
??? <tr>
????? <td><button onclick='_sl(document.myform.city,true);'>全选</button>
????? <button onclick='_sl(document.myform.city,false);'>全不选</button>
????? <button onclick='_setv(document.myform.city,"甘肃,广东");'>set值</button>
????? <button onclick='alert(_getv(document.myform.city));'>get值</button></td>
??? </tr>
??? <tr>
????? <td><div style="width:180px;height:120px;overflow:auto;border: 2px inset #FFFFFF;">
<script language="javascript">
<!--
_checkbox("WebSite","Google.com@=http://www.google.com^Baidu.com@=http://www.baidu.com^Zzsky.cn@=http://www.zzsky.cn","http://www.zzsky.cn")
//-->
</script>
?? </div></td>
??? </tr>
??? <tr>
????? <td><button onclick='_sl(document.myform.WebSite,true);'>全选</button>
????? <button onclick='_sl(document.myform.WebSite,false);'>全不选</button>
????? <button onclick='_setv(document.myform.WebSite,"http://www.google.com");'>set值</button>
????? <button onclick='alert(_getv(document.myform.WebSite));'>get值</button></td>
??? </tr>
?<tr>
????? <td align="center"><button onclick='document.myform.reset();'>重置</button> </td>
??? </tr>
? </table>
</form>
</body>
</html>
来自：http://www.zzsky.cn/effect/content/1492.htm
1 楼 winco304 2010-12-20 不错不错。自己再修改一下，改成弹出/隐藏式的