//Red River Space Walks
function swap(i) {
  if (document.images) {
    document.images[i].src = 'graphics/' +i+'a.gif'
  }
}

function back(i) {
  if (document.images) {
    document.images[i].src = 'graphics/' +i+'.gif'
  }
}
function loadem() { var d=document
  if(d.images) { 
   d.p=new Array();
   var i,a=loadem.arguments,e='a.gif';
   for(i=0; i<a.length; i++) if (a[i]!=0) {
    d.p[i]=new Image(); d.p[i].src='graphics/'+a[i]+e;}}}