function changeImages(typeToChange,toChange,previousVersion) {
document[typeToChange+"_"+toChange].src = "images/static/home/"+typeToChange+"_"+toChange+"_over.jpg";


}
function changeback(typeToChange,toChange,previousVersion) {
document[typeToChange+"_"+toChange].src = "images/static/home/"+typeToChange+"_"+toChange+".jpg";

}