var count = 0;
  var current_id = null;
  var alt_value = null;
  
  var max_count = 4;

  var series = new Array();
  var product = new Array();
  var series_id = {};

  
  series[0] = {};
  series[0]['name'] = 'Semiconductor/FPD Inspection Microscopes';
  series[0]['class'] = 'mx';
  series[0]['class2'] = 'Crntmx';
  series_id['mx'] = 0;
  
  product[0] = new Array('mx61a','mx61l','mx61','mx51');
  
  series[1] = {};
  series[1]['name'] = 'Metallurgical Microscopes';
  series[1]['class'] = 'bx';
  series[1]['class2'] = 'Crntbx';
  series_id['bx'] = 1;
  
  product[1] = new Array('bx61','bx51','bx51m','bx41mled');
  
  series[2] = {};
  series[2]['name'] = 'Inverted Metallurgical Microscopes';
  series[2]['class'] = 'gx';
  series[2]['class2'] = 'Crntgx';
  series_id['gx'] = 2;
  
  product[2] = new Array('gx71','gx51','gx41');
  
  series[3] = {};
  series[3]['name'] = 'Compact Microscopes';
  series[3]['class'] = 'bxfm';
  series[3]['class2'] = 'Crntbxfm';
  series_id['bxfm'] = 3;
  
  product[3] = new Array('bxfm','bxfms');
  
  series[4] = {};
  series[4]['name'] = 'Polarizing Microscopes';
  series[4]['class'] = 'xp';
  series[4]['class2'] = 'Crntxp';
  series_id['xp'] = 4;
  
  product[4] = new Array('bx51p','cx31p');
  
  series[5] = {};
  series[5]['name'] = 'Measuring Microscopes';
  series[5]['class'] = 'stm';
  series[5]['class2'] = 'Crntstm';
  series_id['stm'] = 5;
  
  product[5] = new Array('stm6lm','stm6');
  
  series[6] = {};
  series[6]['name'] = 'Stereo Microscopes';
  series[6]['class'] = 'szx';
  series[6]['class2'] = 'Crntszx';
  series_id['szx'] = 6;
  
  product[6] = new Array('szx16','szx10','szx7','sz61');
  
  series[7] = {};
  series[7]['name'] = 'Digital Cameras';
  series[7]['class'] = 'dc';
  series[7]['class2'] = 'Crntdc';
  series_id['dc'] = 7;
  
  product[7] = new Array('dp72','dp25','dp21');
  

  var product_selected = new Array();
  for(var i = 0; i < product.length; i++){
    product_selected[i] = new Array();
    for(var j = 0; element = product[i][j]; j++){
      product_selected[i][element] = 0;
    }
  }

  function select_image(idname){
    if(product_selected[current_id][idname] == 0){
      if(count == max_count) return;
      document.getElementById(idname).className="crntprd";
      product_selected[current_id][idname] = 1;
      count = count + 1;
      if(count == max_count){
        step_class("3");
      }else{
        step_class("2,3");
      }
    }else{
      document.getElementById(idname).className="prd";
      product_selected[current_id][idname] = 0;
      count = count - 1;
      if(count == 0){
        step_class("2");
      }else{
        step_class("2,3");
      }
    }
  }
  function select_off(){
    if(current_id != null){
      for(var i = 0; element = product[current_id][i]; i++){
        document.getElementById(element).className="prd";
        product_selected[current_id][element] = 0;
        count = 0;
      }
    }
	if(current_id != null){
      step_class("2");
	}
  }
  function submit_form(){
    if(count == 0){
      alert('The product is not selected yet.');
      return;
    }
    var query = "";
    for(var i = 0; element = product[current_id][i]; i++){
      if(product_selected[current_id][element] == 1){
        if(query != "") query += ",";
        query += element;
      }
    }
//    location.href='compare.cfm?id='+query;
      window.open('compare_s.cfm?id='+series[current_id]['class']+','+query);
  }
  function select_series(series_no){
    select_off();
    max_count = product[series_no].length;
    document.getElementById('series_name').innerHTML = series[series_no]['name'];
    document.getElementById('series_name2').innerHTML = series[series_no]['name'];
    step_class("2");
    for(var i = 0; i < series.length; i++){
      if(series_no == i){
        document.getElementById('series'+i).className = series[i]['class2'];
      }else{
        document.getElementById('series'+i).className = series[i]['class'];
      }
    }
    document.getElementById('products').innerHTML = '';
    for(var i = 0; element = product[series_no][i]; i++){
      var tabindex = product.length + 1 + i + 1;
	  if(element == 'sz61'){
	    alt_value = 'sz61/sz51';
	  }else{
	    alt_value = element;
	  }
      document.getElementById('products').innerHTML += '<li class="prd" id="'+ element +'"><a href="javascript:select_image(\''+ element +'\')"><img src="/en/ga/spec/image/prodimage/'+ element +'.jpg" alt="'+ alt_value.toUpperCase() +'" width="98" height="118" title="'+ alt_value.toUpperCase() +'"></a></li>';
    }
    current_id = series_no;
  }
  function step_class(step_no){
    document.getElementById('step1').className = "step";
    document.getElementById('step2').className = "step";
    document.getElementById('step3').className = "step";
    step_array = step_no.split(",");
    for(var i = 0; i < step_array.length; i++){
      document.getElementById('step'+step_array[i]).className = "crnt"+step_array[i];
    }
  }