context: function _start(tree) {  // save here  var _saved_fieldvals = [];  var inputFields = document.getElementsByTagName("input");  for (var i = 0; i < inputFields.length; i++) {      var current = inputFields[i];     _saved_fieldvals.push({'field' : current.id, 'value' : current.value});  }  var d = document.documentElement;  var l = d.childNodes.length;  for (var i = 0; i < l; i++) {     d.removeChild( d.childNodes[0] );  }  for (var i = 0; i < tree[0].childNodes.length; i++) {    var it = tree[0].childNodes[i].cloneNode(true);    d.appendChild( it );  }  // restore here  for (var i = 0; i < _saved_fieldvals.length; i++) {      var current = _saved_fieldvals[i];     var elem = document.getElementById(current.field);     if (elem) {        elem.value = current.value;      }  }    // hmm.  _focus();  _alert(time() - start_time + ' milliseconds');}
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