function fnMakeColumnHeight(){
 var divCenter = document.getElementById("centerColumn");
 var divRight = document.getElementById("rightColumn");
 var divLeft = document.getElementById("leftColumn");
 var divHeightCenter, divHeightRight, divHeightLeft;

 if(divCenter.offsetHeight){ 
    divHeightCenter=divCenter.offsetHeight; 					
  } 
  else if(divCenter.style.pixelHeight){ 
    divHeightCenter=divCenter.style.pixelHeight;					 
  } 
 if(divRight.offsetHeight){ 
    divHeightRight=divRight.offsetHeight; 					
  } 
  else if(divRight.style.pixelHeight){ 
    divHeightRight=divRight.style.pixelHeight;					 
  }
  
  if (divLeft){
    if(divLeft.offsetHeight){ 
      divHeightLeft=divLeft.offsetHeight; 					
    } 
    else if(divLeft.style.pixelHeight){ 
      divHeightLeft=divLeft.style.pixelHeight;					 
    }
  }
  else{ divHeightLeft = 0;}
  
  if (divHeightLeft>divHeightCenter) {divHeightCenter = divHeightLeft;}
  if (divHeightRight < divHeightCenter){
  document.getElementById("rightColumn").style.height = divHeightCenter + 'px';
  }
}