function processViewer(){
  this.tabQty;
  this.tabLinkId;
  this.tabBoxId;
  this.tabClass;
  this.tabClassActive;
  
  this.changeTab = function(tab_num){
    for (var i = 1; i < this.tabQty + 1; i++){
      var tabCount = i.toString()
      $(this.tabBoxId+tabCount).style.display = 'none';
      $(this.tabLinkId+tabCount).className = this.tabClass;
    }
    $(this.tabLinkId+tab_num).className = this.tabClassActive;
    $(this.tabBoxId+tab_num).style.display = 'block';
  }
}