var KeepVar; 

function ChangePicture(Name)
{
KeepVar = Name;
SwitchImg = "images/" + Name + "_h.gif"; 

document.images[Name].src=SwitchImg;
} 

function Fix()
{
SwitchImg = "images/" + KeepVar + "_l.gif";
document.images[KeepVar].src=SwitchImg;
}