纯JavaScript实现静态树结构布局

<script language="JavaScript1.2">
scores = new Array(20);
var numTotal=0;NS4 = (document.layers) ? 1 : 0;IE4 = (document.all) ? 1 : 0;ver4 = (NS4 || IE4) ? 1 : 0;
if (ver4) {    
 with (document) {        
  write("<STYLE TYPE='text/css'>");
         if (NS4) {            
      write(".parent {position:absolute; visibility:visible}");
            write(".child {position:absolute; visibility:visible}");
         write(".regular {position:absolute; visibility:visible}")
       }else { 
           write(".child {display:none}") 
        } 
           write("</STYLE>");
          }
    }
    function getIndex(el) {    
     ind = null;    
     for (i=0; i<document.layers.length; i++) 
     {        whichEl = document.layers[i];        
      if (whichEl.id == el) {            
      ind = i;            
      break;        
      }    
     }    return ind;
    }
     function arrange() {    
      nextY = document.layers[firstInd].pageY +document.layers[firstInd].document.height;    
      for (i=firstInd+1; i<document.layers.length; i++) {       
        whichEl = document.layers[i];