//描述: 添加不重复列表框元素
function selAdd( srcList, dstList )
{
var selectedIndex = new Array();
var count = 0;

for ( i=0; i<srcList.options.length; i++ ){

if ( srcList.options[i].selected ){

selectedIndex[count] = i;
count ++;

}
}

for ( j=0; j<selectedIndex.length; j++ ){

k = selectedIndex[j];

if ( chkDup( srcList.options[k].value, dstList )==false ){
dstList.options.length++;
var len = dstList.options.length-1;
dstList.options[len].value = srcList.options[k].value;
dstList.options[len].text = srcList.options[k].text;
}

}

}

//描述: 删除列表框元素
function selDel( list )
{
var len = list.options.length;
var idx = 0;

while ( idx< len ){

if ( list.options[idx].selected ){
list.options.remove(idx);
len = list.options.length;
}
else{
idx ++;
}
}
}

//描述: 检测列表框元素重复
function chkDup( item, list )
{
for ( i=0; i<list.options.length; i++ ){
//alert( item + " - " + list.options[i].value );
if ( item == list.options[i].value ){
return true;
}
}
return false;
}

//描述: 选择列表框的全部成员
function selSel( list, item )
{
item.value = " ";
for ( i=0; i<list.options.length; i++ ){
list.options[i].selected=true;
item.value += list.options[i].value + " ";
}

}

function selSelSingle( list, value )
{
for ( i=0; i<list.options.length; i++ ){
if ( list.options[i].value == value ){
list.options[i].selected=true;
break;
}
}

}
//描述: 根据数组初始化列表框
function selList( item, arr )
{

var curIndex, insIndex, val, text;
var arrItem = new Array();

if ( item ){

item.length = 0;
curIndex = 0;

for ( i=0; i<arr.length; i++ ){

item.length ++;
insIndex = item.length - 1;

if ( arr[i] ){
arrItem = arr[i].split( ", " );
text = arrItem[1];
val = arrItem[0];
item.options[ insIndex ].text = text;
item.options[ insIndex ].value= val;
}
}

}
}