_cbody=document.getElementById("cbody").getElementsByTagName("blockquote")[0];
objs=_cbody.getElementsByTagName("div");

slides=new Array();
cols=new Array();
k=0;
sum=0;
for(i=0; i<objs.length; i++){
    if(objs[i].className=="slide"){
         slides[k++]=objs[i];
         sum+=objs[i].offsetHeight;
    }
}

for(i=0;i<3;i++){
    newEl=document.createElement("div");
    _cbody.insertBefore(newEl,_cbody.firstChild);
    newEl.className="cols";
    newEl.id="col_"+(2-i);
}


maxh=Math.round(sum/3)+100;
cn=0;
curh=0;
for(i=0; i<slides.length; i++){
    curh+=slides[i].offsetHeight;
    if(curh>maxh){
         cn++;
         curh=slides[i].offsetHeight;
    }
    if(cn==3) cn=2;
    document.getElementById("col_"+cn).appendChild(slides[i]);
}