temp1=new Image; temp1b=new Image; 
temp1.src="images/1_on.jpg"; 
temp1b.src="images/1.jpg"; 

temp2=new Image; temp2b=new Image; 
temp2.src="images/2_on.jpg"; 
temp2b.src="images/2.jpg"; 

temp3=new Image; temp3b=new Image; 
temp3.src="images/3_on.jpg"; 
temp3b.src="images/3.jpg"; 

temp4=new Image; temp4b=new Image; 
temp4.src="images/4_on.jpg"; 
temp4b.src="images/4.jpg"; 

temp5=new Image; temp5b=new Image; 
temp5.src="images/5_on.jpg"; 
temp5b.src="images/5.jpg";