rem: cell.setAttribute("value", val); 
add: cell.setAttribute("label", val); 
context:   buildTreeHead: function()  {    var cols = this.mColumns;    var row = this.mTreeHeadRow;    var cell, val;    for (var i = 0; i < cols.length; i++) {      cell = document.createElementNS(kXULNSURI, "treecell");      cell.setAttribute("class", "treecell-header");      val = cols[i].title;      if (val)        cell.setAttribute("value", val);      row.appendChild(cell);    }  },
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/0b2dd2b2d2fd037df917e07645fa019a963332a5/inTreeTableBuilder.js/clean/extensions/inspector/resources/content/jsutil/xul/inTreeTableBuilder.js