if (document.images) 
    {   
		var f1 = new Image()
        f1.src = "images/o_home.gif"
        var f1a = new Image()
        f1a.src = "images/home.gif"

		var f2 = new Image()
        f2.src = "images/o_about.gif"
        var f2a = new Image()
        f2a.src = "images/about.gif"
        
        var f3 = new Image()
        f3.src = "images/o_products.gif"
        var f3a = new Image()
        f3a.src = "images/products.gif"

        var f4 = new Image()
        f4.src = "images/o_news.gif"
        var f4a = new Image()
        f4a.src = "images/news.gif"
		
		var f5 = new Image()
        f5.src = "images/o_certificates.gif"
        var f5a = new Image()
        f5a.src = "images/certificates.gif"
		
		var f6 = new Image()
        f6.src = "images/o_job.gif"
        var f6a = new Image()
        f6a.src = "images/job.gif"

		var f7 = new Image()
        f7.src = "images/o_contact.gif"
        var f7a = new Image()
        f7a.src = "images/contact.gif"

    	}
function Over(imgName) 
    {   if (document.images) 
        document[imgName].src = eval(imgName + '.src')        
    }
	 

function Out(imgName) 
    {   
    	if (document.images) 
        document[imgName].src = eval(imgName + 'a.src')        

	 }