function $get(element)
{
    return document.getElementById(element);
}

function expand(parent,sub)
{
    $get(sub).style.display= parent.checked ? "block" : "none";
}

function change_type(bool,element1,element2)
{
    if($get(element1)!=null) $get(element1).disabled = !bool;
    if($get(element2)!=null) $get(element2).disabled = !bool;
}

function select_type(sender)
{
    $get(sender).checked = true;
}

/* 当前行鼠标滑上的颜色效果 */
function Item_OnMouseOver(row)
{
    var rows = row.parentNode.getElementsByTagName('div');
    for(var i=0; i<rows.length; i++)
    {
        if(rows[i].className != 'item Item-Selected')
            rows[i].className   = 'item Item-Default';
    }
    if(row.className != 'item Item-Selected')
        row.className   = 'item Item-OnMouseOver';
}

/* 当前行选中的颜色效果 */
function Item_OnSelected(row)
{
    var rows = row.parentNode.getElementsByTagName('div');
    for(var i=0; i<rows.length; i++)
    {
        rows[i].className   = 'item Item-Default';
    }
    row.className   = 'item Item-Selected';
}

function goTop()
{
    window.scrollTo(0,0);
}