function over(name,imgObj)  {
    if (document[name]) {document[name].src = eval(name+"_act.src");}
    else if (imgObj)    {imgObj.src = eval(name+".src");}
}
function out(name,imgObj)   {
    if (document[name]) {document[name].src = eval(name+".src");}
    else if (imgObj)    {imgObj.src = eval(name+"_act.src");}
}