CheckBoxList 和 DropDownList 的二级联动

< scriptlanguage = " javascript " type = " text/javascript " >
<!--
// 添加CheckBoxList事件
function addAffair()
... {
var checkList = document.getElementById( " cblTeamPerson " );
var childrens = checkList.getElementsByTagName( " input " );
var count = childrens.length;
if (count == 0 )
return ;

var checkBox;
var checkBoxid;
for ( var i = 0 ;i < count;i ++ )
... {
checkBoxid = " cblTeamPerson_ " + i;
checkBox = document.getElementById(checkBoxid);
checkBox.onclick = function (ev)
... {
checkedAffair((ev || window.event).srcElement || ev.currentTarget);
}
}
}

// 添加CheckBox的onclick事件
function checkedAffair(checkBoxID)
... {
var checkBox = document.getElementById(checkBoxID.id);
var dropDownList = document.getElementById( " ddlTeamLeader " );
if (checkBox.checked == true )
... {
var newOption = document.createElement( " OPTION " );
newOption.text = getText(checkBox.id);
newOption.value = getValue(checkBox.id);
dropDownList.options.add(newOption);
}
else if (checkBox.checked == false )
... {
var strValue = getValue(checkBox.id);
var count = dropDownList.options.length;
var children;

for ( var i = 0 ;i < count;i ++ )
... {
children = dropDownList.options[i].value;
if (children == strValue)
... {
dropDownList.options.remove(i);
}
}
}
}

// Gettheevent.onclickText
function getText(checkBoxID)
... {
var checkBoxList = document.getElementById( " cblTeamPerson " );
var checkbox = checkBoxList.getElementsByTagName( " input " );
var index = getValue(checkBoxID);
var intIndex = parseInt(index);

alert(checkbox[index].nextSibling.innerHTML);

var value = checkbox[index].nextSibling.innerHTML;
return value;
}

// Gettheevent.onclickValue
function getValue(checkBoxID)
... {
var checkBox = document.getElementById(checkBoxID);
var factLength = checkBox.id.length;
if (factLength == 15 )
... {
return checkBox.id.substring( 14 , 15 );
}
else
... {
return checkBox.id.substring( 14 , 16 );
}
}
// -->
</ script >

遇到的2个比较严重的问题

1、在addAffair（）时，页面生成后给客户端生成的单一的checkbox挂onclick事件，如果直接写成

checkBox.onclick = checkedAffair（）；是不响应的，这是在调用函数，应该

checkBox.onclick = function(ev) { 函数 }

2、getText（），取不到checkbox的Text，Value貌似确实取不到，改用获取checkbox的ClientID的尾数来记录value的办法，但是getElementById，取到的只是“on”，后来又想根据getElementsByTagName("input")得到checked的index，但是返回的值是undefind，后来又想通过CheckBoxList生成的<table>，用DOM模型来取，依然找不到

解决办法 var value = checkbox[index].nextSibling.innerHTML;

CheckBoxList 和 DropDownList 的二级联动