function hide(ID1){
obj1=document.getElementById(ID1);
if(obj1!=null){ obj1.style.visibility='hidden';obj1.style.position='absolute'; } 
}
function show(ID1){
obj2=document.getElementById(ID1);
if(obj2!=null){ obj2.style.visibility=''; obj2.style.position=''; }
}
function Expand(ID){ hide(ID+"_show"); show(ID+"_hide");show(ID);}
function Contract(ID){ hide(ID+"_hide"); show(ID+"_show");hide(ID); }