if (document.images) 
{ 
          one = new Image(); 
          one.src = "../images/MainPage2.gif";
		  two = new Image();
	      two.src = "../images/TheClinic2.gif";
		  three = new Image();
	      three.src = "../images/Articles2.gif";
	 	  four = new Image();
		  four.src = "../images/TheCEO2.gif";
		  five = new Image();
		  five.src = "../images/Contact2.gif";
		  six = new Image();
		  six.src = "../images/Forum2.gif";
		  seven = new Image();
		  seven.src = "../images/Newsletter2.gif";
}  
function switchit(obj,img){ 
         if (document.images) 
         { 
                 obj.src=img 
         } 
}