var nscape = (document.all)? false:true;

//=============================================================
function ImgOnfocus(name){
  if (nscape){
    var what = document.getElementById(name).src;
    document.getElementById(name).src = what.substring(0,what.indexOf(".gif"))+"1.gif"
  }else{
    var what = document.all.item(name).src;
    document.all.item(name).src=what.substring(0,what.indexOf(".gif"))+"1.gif";
  }
}
//==========================================================
function ImgNofocus(name){
  if (nscape){
    var what = document.getElementById(name).src;
    document.getElementById(name).src = what.substring(0,what.indexOf("1.gif"))+".gif"
  }else{
    var what = document.all.item(name).src;
	document.all.item(name).src=what.substring(0,what.indexOf("1.gif"))+".gif";
  }
}