SelectAll

function selectAll(obj)
    {
        var theTable  = obj.parentElement.parentElement.parentElement;
        var i;
        var j = obj.parentElement.cellIndex;
       
        for(i=0;i<theTable.rows.length;i++)
        {
            var objCheckBox = theTable.rows[i].cells[j].firstChild;
            if(objCheckBox.checked!=null)objCheckBox.checked = obj.checked;
        }
    }

   function $(id)
   {
       return document.getElementById(id);
   }