var browserOK = false;
    var pics;

  
    browserOK = true;  
    pics = new Array();



  function imgover(count){  
    if (browserOK) { 
      document.images[pics[count][2]].src=pics[count][1].src;
	  //document.getElementById(pics[count][2]).src = pics[count][1].src;
    }
  }  
  function imgout(count){     
    if (browserOK) { 
      document.images[pics[count][2]].src=pics[count][0].src;
    }  
  }
  function preload(count,name, first, second) { 
    if (browserOK) { 
      pics[count] = new Array(3);   
      pics[count][0] = new Image();   
      pics[count][0].src = first;    
      pics[count][1] = new Image();    
      pics[count][1].src = second;    
      pics[count][2] = name; }  
  }
   
	preload(1,"calibration", "images/calibration1.gif", "images/calibration2.gif");
	preload(2,"electrical", "images/electrical1.gif", "images/electrical2.gif");
	preload(3,"fire_explosion", "images/fire_explosion1.gif", "images/fire_explosion2.gif");
	preload(4,"mechanical", "images/mechanical1.gif", "images/mechanical2.gif");
	preload(5,"ppe", "images/ppe1.gif", "images/ppe2.gif");
	preload(6,"wire_ropes", "images/wire_ropes1.gif", "images/wire_ropes2.gif");
	preload(7,"home", "images/home1.gif", "images/home2.gif");
	preload(8,"about_us", "images/about_us1.gif", "images/about_us2.gif");
	preload(9,"news", "images/news1.gif", "images/news2.gif");
	preload(10,"forms", "images/forms1.gif", "images/forms2.gif");
	preload(11,"certification", "images/certification1.gif", "images/certification2.gif");
	preload(12,"training", "images/training1.gif", "images/training2.gif");
	preload(13,"acc_invest", "images/acc_invest1.gif", "images/acc_invest2.gif");
	preload(14,"safety_research", "images/safety_research1.gif", "images/safety_research2.gif");
	preload(15,"privacy", "images/privacy1.gif", "images/privacy2.gif");  
	preload(16,"disclaimer", "images/disclaimer1.gif", "images/disclaimer2.gif");  
	preload(17,"top", "images/top1.gif", "images/top2.gif");
	preload(18,"testing_services", "images/testing_services1.gif", "images/testing_services2.gif");	
	preload(19,"affiliates", "images/affiliates1.gif", "images/affiliates2.gif");		
	preload(20,"chemical_analysis_lab", "images/chemical_analysis_lab1.gif", "images/chemical_analysis_lab2.gif");  
	preload(21,"nav_contact_us", "images/contact_us1.gif", "images/contact_us2.gif");	
	preload(22,"adv_search", "images/adv_search1.gif", "images/adv_search2.gif");	
	preload(23,"chinese_translation", "images/chinese_navigation1.gif", "images/chinese_navigation2.gif");