function changeImage1(){
    document.myimg1.src="img/pileon_2.gif";
}
function changeImage2(){
    document.myimg1.src="img/pileon_1.gif";
}
function changeImage3(){
    document.myimg2.src="img/pileon_2.gif";
}
function changeImage4(){
    document.myimg2.src="img/pileon_1.gif";
}
function changeImage5(){
    document.myimg3.src="img/pileon_2.gif";
}
function changeImage6(){
    document.myimg3.src="img/pileon_1.gif";
}
function changeImage7(){
    document.myimg4.src="img/pileon_2.gif";
}
function changeImage8(){
    document.myimg4.src="img/pileon_1.gif";
}
function changeImage9(){
    document.myimg5.src="img/pileon_2.gif";
}
function changeImage10(){
    document.myimg5.src="img/pileon_1.gif";
}
function changeImage11(){
    document.myimg6.src="img/pileon_2.gif";
}
function changeImage12(){
    document.myimg6.src="img/pileon_1.gif";
}
function changeImage13(){
    document.myimg7.src="img/pileon_2.gif";
}
function changeImage14(){
    document.myimg7.src="img/pileon_1.gif";
}
function changeImage15(){
    document.myimg8.src="img/pileon_2.gif";
}
function changeImage16(){
    document.myimg8.src="img/pileon_1.gif";
}
function changeImage17(){
    document.myimg9.src="img/pileon_2.gif";
}
function changeImage18(){
    document.myimg9.src="img/pileon_1.gif";
}
function changeImage19(){
    document.myimg10.src="img/pileon_2.gif";
}
function changeImage20(){
    document.myimg10.src="img/pileon_1.gif";
}
function changeImage21(){
    document.myimg11.src="img/pileon_2.gif";
}
function changeImage22(){
    document.myimg11.src="img/pileon_1.gif";
}
function changeImage23(){
    document.myimg12.src="img/pileon_2.gif";
}
function changeImage24(){
    document.myimg12.src="img/pileon_1.gif";
}