img1src = new Image();
img1src.src = "images/selfhelp_button2.gif";

img2src = new Image();
img2src.src = "images/selfhelp_button1.gif";

function swapImage(){
theImg=document.getElementById("picture");
theImg.setAttribute("src","images/selfhelp_button2.gif");
}

function restoreImage(){
theImg=document.getElementById("picture");
theImg.setAttribute("src","images/selfhelp_button1.gif");
}