function getLefCen()
{ 
      var divs,centDiv,divCenHeight,centerCol; 
	
    
    
    // get all <div> elements in the document 
     divs=document.getElementsByTagName('div'); 

     centDiv=[]; 
      

     // initialize maximum height value 
     maxHeight=0; 
     
      
          contentTopDiv = document.getElementById("content_top");
          contentBotDiv = document.getElementById("content_bottom");
          contentTop = getPixelsFromTop(contentTopDiv);
          contentBottom = getPixelsFromTop(contentBotDiv);
          maxHeight = contentBottom-contentTop;
     //alert("C "+maxHeight); 	
     
     
     //loop through divs
     for(var i=0;i<divs.length;i++)
     { 
     
      	if(/\bcenterColumn\b/.test(divs[i].className))
      	{ 
		tz = divs[i];
		tz.style.height=maxHeight+"px"; 
		
		
		
		
		
         }
     }
       
   
     
    	 
  
     
}     


 function getPixelsFromTop(obj){
        objFromTop = obj.offsetTop;
        while(obj.offsetParent!=null) {
        objParent = obj.offsetParent;
        objFromTop += objParent.offsetTop;
        obj = objParent;
        }
        return objFromTop;
}