if (document.images)
{
  pic1= new Image(); 
  pic1.src="_images/button01over.gif"; 
  
  pic2= new Image(); 
  pic2.src="_images/button02over.gif"; 
  
  pic3= new Image(); 
  pic3.src="_images/button03over.gif"; 
  
  pic4= new Image(); 
  pic4.src="_images/button04over.gif"; 
  
  pic5= new Image(); 
  pic5.src="_images/button05over.gif"; 
  
  pic6= new Image(); 
  pic6.src="_images/button06over.gif"; 
  
  pic7= new Image(); 
  pic7.src="_images/button07over.gif"; 
  
  pic8= new Image(); 
  pic8.src="_images/button08over.gif"; 
}