matchColumns=function(){
     var divs,contDivs,maxHeight,divHeight,d;
     divs=document.getElementsByTagName('div');
     contDivs=[];
     maxHeight=0;
     for(var i=0;i<divs.length;i++){
          if(/\bcolumn\b/.test(divs[i].className)){
                d=divs[i];
                contDivs[contDivs.length]=d;
                if(d.offsetHeight){
                     divHeight=d.offsetHeight;
                }
                else if(d.style.pixelHeight){
                     divHeight=d.style.pixelHeight;
                }
                maxHeight=Math.max(maxHeight,divHeight);
          }
     }
     for(var i=0;i<contDivs.length;i++){
          contDivs[i].style.height=maxHeight + "px";
     }
}