//全选=========================================
function checkAll()
{
    for (var i = 0; i < form1.elements.length; i++)
    {
        var e = form1.elements[i];
        if (e.name != 'selectAll')
            e.checked = form1.selectAll.checked;
    }
}

//清除默认文本=== onfocus="cls();" onblur="res();"
function cls()
{
    with (event.srcElement)
        if (value == defaultValue) value = "";
}

//恢复默认文本================================
function res()
{
    with (event.srcElement)
        if (value == "") value = defaultValue;
}