if (document.images) { 
image1on = new Image 
image2on = new Image 
image3on = new Image 
image4on = new Image 
image5on = new Image 
image6on = new Image 
image7on = new Image 
image8on = new Image 
image1on.src = 'images/nav/aboutus_ON.gif' 
image2on.src = 'images/nav/management_ON.gif' 
image3on.src = 'images/nav/services_ON.gif'
image4on.src = 'images/nav/approach_ON.gif'
image5on.src = 'images/nav/contactus_ON.gif'
image6on.src = 'images/nav/news_ON.gif'
image7on.src = 'images/nav/XLT_ON.gif'
image8on.src = 'images/nav/home_ON.gif'
image1off = new Image 
image2off = new Image 
image3off = new Image  
image4off = new Image 
image5off = new Image 
image6off = new Image 
image7off = new Image 
image8off = new Image 
image1off.src = 'images/nav/aboutus_OFF.gif' 
image2off.src = 'images/nav/management_OFF.gif' 
image3off.src = 'images/nav/services_OFF.gif'
image4off.src = 'images/nav/approach_OFF.gif'
image5off.src = 'images/nav/contactus_OFF.gif'
image6off.src = 'images/nav/news_OFF.gif'
image7off.src = 'images/nav/XLT_OFF.gif'
image8off.src = 'images/nav/home_OFF.gif'
}