if (document.images){   

     button1 = new Image
     button2 = new Image
	 button3 = new Image
     button4 = new Image
	 button5 = new Image
     button6 = new Image
	 button7 = new Image
     button8 = new Image
	 button9 = new Image
     button10 = new Image
	 button11 = new Image
     button12 = new Image
	 button13 = new Image
     button14 = new Image
	 	 

     button1.src = 'images/home.jpg'
     button2.src = 'images/home2.jpg'
	  button3.src = 'images/about.jpg'
     button4.src = 'images/about2.jpg'
	  button5.src = 'images/how-its-work.jpg'
     button6.src = 'images/how-its-work2.jpg'
	  button7.src = 'images/install.jpg'
     button8.src = 'images/install2.jpg'
	  button9.src = 'images/blog.jpg'
     button10.src = 'images/blog2.jpg'
	  button11.src = 'images/contact.jpg'
     button12.src = 'images/contact2.jpg'
	  button13.src = 'images/read.jpg'
     button14.src = 'images/read2.jpg'
	 
	 }