fDomOffset = function( oObj, sProp )
{
 var iVal = 0;
 while (oObj && oObj.tagName != 'BODY') {
  eval('iVal += oObj.' + sProp + ';');
  oObj = oObj.offsetParent;
 }
 return iVal;
}
fSwapSelect = function( sId ) 
{ 
 oObj = document.getElementById(sId); 
 Top_Element  = fDomOffset(oObj, 'offsetTop'); 
 Left_Element  = fDomOffset(oObj, 'offsetLeft'); 
 Largeur_Element  = oObj.offsetWidth; 
 Hauteur_Element  = oObj.offsetHeight; 
 oSelects = document.getElementsByTagName('SELECT'); 
 if (oSelects.length > 0) { 
  for (i = 0; i < oSelects.length; i++) { 
   oSlt = oSelects[i]; 
   Top_Select = fDomOffset(oSlt, 'offsetTop'); 
   Left_Select = fDomOffset(oSlt, 'offsetLeft'); 
   Largeur_Select = oSlt.offsetWidth; 
   Hauteur_Select = oSlt.offsetHeight; 
   isLeft = false; 
   if ((Left_Element > (Left_Select - Largeur_Element)) && (Left_Element < (Left_Select + Largeur_Select))) { 
    isLeft = true; 
   } 
   isTop = false; 
   if ((Top_Element > (Top_Select - Hauteur_Element)) && (Top_Element < (Top_Select + Hauteur_Select))) { 
    isTop = true; 
   } 
   if (isLeft && isTop) { 
    sVis = (oObj.style.visibility == 'hidden') ? 'visible' : 'hidden'; 
    if (oSlt.style.visibility != sVis) {oSlt.style.visibility = sVis;} 
   } else { 
    if (oSlt.style.visibility != 'visible') {oSlt.style.visibility = 'visible';} 
   } 
  } 
 } 
}