function checkAll()
{
    var inputs = document.getElementsByTagName('input');
    var checkboxes = [];
    for (var i = 0; i < inputs.length; i++) {

        if (inputs[i].type == 'checkbox') {
          inputs[i].checked =true;
        }
    }
}

function unCheckAll()
{
    var inputs = document.getElementsByTagName('input');
    var checkboxes = [];
    for (var i = 0; i < inputs.length; i++) {

        if (inputs[i].type == 'checkbox') {
          inputs[i].checked = false;
        }
    }
}

function removeObject(vid)
{
    document.getElementById(vid).innerHTML='<button onclick="showObject(&#39;' + vid + '&#39;); return false;" style="margin-left: 10px;background-color:green;color:white;">恢复该视频</button>';
}

function showObject(vid)
{
    var url2video = 'http://www.youtube.com/v/' + vid + '&amp;autoplay=0&amp;rel=0&amp;fs=1&amp;color1=0x3a3a3a&amp;color2=0x999999&amp;border=0&amp;loop=0&amp;fmt%3D18';
    var newcodeline = '<object width="425" height="344">';
    newcodeline += '<param name="movie" value="' + url2video + '" />';
    newcodeline += '<param name="allowfullccreen" value="true" />';
    newcodeline += '<param name="allowscriptaccess" value="always" />';
    newcodeline += '<embed src=" ' + url2video + '" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed>';
    newcodeline += '<a href ="http://www.youtube.com/watch?v=' + vid + '" style="color:green;font-size:80%;text-decoration:none;">http://www.youtube.com/watch?v=' + vid + '</a>';
    newcodeline += '<button onclick="removeObject(&#39;' + vid + '&#39;); return false;" style="margin-left: 10px;background-color:red;color:white;">清除该视频</button>';
    document.getElementById(vid).innerHTML=newcodeline;
}