var DHTML = (document.getElementById || document.all || document.layers);
var ratingLabels = new Array();
var ratingScoresLow = new Array();
var ratingScoresHigh = new Array();
	ratingLabels[0]    = "NOT RELEVANT";
	ratingScoresLow[0] = -2.5;
	ratingScoresHigh[0] = -1.5;
	ratingLabels[1]    = "LESS INTERESTING";
	ratingScoresLow[1] = -1.5;
	ratingScoresHigh[1] = -0.3;
	ratingLabels[2]    = "NEUTRAL";
	ratingScoresLow[2] = -0.3;
	ratingScoresHigh[2] = 0.3;
	ratingLabels[3]    = "INTERESTING";
	ratingScoresLow[3] = 0.3;
	ratingScoresHigh[3] = 1.5;
	ratingLabels[4]    = "VERY INTERESTING";
	ratingScoresLow[4] = 1.5;
	ratingScoresHigh[4] = 2.5;

function getObj(name)
{
  if (document.getElementById)
  {
  this.obj = document.getElementById(name);
	this.style = document.getElementById(name).style;
  }
  else if (document.all)
  {
	this.obj = document.all[name];
	this.style = document.all[name].style;
  }
  else if (document.layers)
  {
   	this.obj = document.layers[name];
   	this.style = document.layers[name];
  }
}


function toggleMiddle(id, mode) {
	var left = new getObj('m_' + id + '_left');
	var right = new getObj('m_' + id + '_right');
	if(mode == 'show') {
		left.style.background = "url('http://www.bigthink.com/lib/rating/images/left.gif') right center";
		right.style.background = "url('http://www.bigthink.com/lib/rating/images/right.gif') left center";
	} else {
		left.style.background = "";
		right.style.background = "";
	}
}

function getLabel(v) {
	for(var a = 0; a <= 4; a++) {
		var currentScoreLow = ratingScoresLow[a];
		var currentScoreHigh = ratingScoresHigh[a];
		if(v > currentScoreLow && v < currentScoreHigh) label = ratingLabels[a];
	}
	return label + "<br>";
}