// JavaScript Document
// multiple button replacement on click

// PRELOADING IMAGES
if (document.images) {
 btn1_on =new Image();  btn1_on.src ="images/buttons/20x20click.gif"; 
 btn1_off=new Image();  btn1_off.src="images/buttons/20x20.gif"; 

 btn2_on =new Image();  btn2_on.src ="images/buttons/20x30click.gif"; 
 btn2_off=new Image();  btn2_off.src="images/buttons/20x30.gif"; 

 btn3_on =new Image();  btn3_on.src ="images/buttons/20x40click.gif"; 
 btn3_off=new Image();  btn3_off.src="images/buttons/20x40.gif"; 

 btn4_on =new Image();  btn4_on.src ="images/buttons/30x30click.gif"; 
 btn4_off=new Image();  btn4_off.src="images/buttons/30x30.gif"; 

 btn5_on =new Image();  btn5_on.src ="images/buttons/30x45click.gif"; 
 btn5_off=new Image();  btn5_off.src="images/buttons/30x45.gif"; 

 btn6_on =new Image();  btn6_on.src ="images/buttons/30x60click.gif"; 
 btn6_off=new Image();  btn6_off.src="images/buttons/30x60.gif"; 

 btn7_on =new Image();  btn7_on.src ="images/buttons/40x60click.gif"; 
 btn7_off=new Image();  btn7_off.src="images/buttons/40x60.gif"; 

 btn8_on =new Image();  btn8_on.src ="images/buttons/40x80click.gif";
 btn8_off=new Image();  btn8_off.src="images/buttons/40x80.gif";  

 btn9_on =new Image();  btn9_on.src ="images/buttons/40x100click.gif"; 
 btn9_off=new Image();  btn9_off.src="images/buttons/40x100.gif"; 
}

function btnclick(k) {
 if (document.images) 
  eval('document.btn'+k+'.src=btn'+k+'_on.src');
}

function btnrelease(k) {
 if (document.images) 
  eval('document.btn'+k+'.src=btn'+k+'_off.src');
}