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function getElementsByClassName(classname, node)  {

    if(!node) node = document.getElementsByTagName("body")[0];

    var a = [];

    var re = new RegExp('\\b' + classname + '\\b');

    var els = node.getElementsByTagName("*");

    for(var i=0,j=els.length; i<j; i++)

        if(re.test(els[i].className))a.push(els[i]);

    return a;

}

function setCookie(c_name,value,exdays)

{

  var exdate=new Date();

  exdate.setDate(exdate.getDate() + exdays);

  var c_value=escape(value) + ((exdays==null) ? "" : "; expires="+exdate.toUTCString());

  document.cookie=c_name + "=" + c_value;

}

function getCookie(c_name)

{

  var c_value = document.cookie;

  var c_start = c_value.indexOf(" " + c_name + "=");

  if (c_start == -1)

  {

    c_start = c_value.indexOf(c_name + "=");

  }

  if (c_start == -1)

  {

    c_value = null;

  }

  else

  {

    c_start = c_value.indexOf("=", c_start) + 1;

    var c_end = c_value.indexOf(";", c_start);

    if (c_end == -1)

    {

      c_end = c_value.length;

    }

  c_value = unescape(c_value.substring(c_start,c_end));

}

return c_value;

}