// Chained Selects Parser

// Copyright Xin Yang 2004
// Web Site: www.yxScripts.com
// EMail: m_yangxin@hotmail.com
// Last Updated: 2005-02-09

var subCount=1, maxNest=1, nestCount=1;
var separator=",";

function parseOption(list, text, value, pick) {
  return 'addOption("'+list+'", "'+text+'", "'+value.replace(/\s+$/,"")+'"'+(pick?', 1':'')+");\n";
}

function parseListOption(list, text, value, sub, pick) {
  return 'addList("'+list+'", "'+text+'", "'+value.replace(/\s+$/,"")+'", "'+sub+'"'+(pick?', 1':'')+");\n";
}

function parseList(list, text, value, sub, pick, sublist) {
  var content="", subContent="", sc;
  var i=sublist.firstChild, item=null;

  while (i) {
    if (i.nodeType==1) {
      if (i.tagName && i.tagName=="LI") {
        if (item!=null) {
          content+=parseOption(sub, item[0], item[1]||item[0], item[2]||0);
        }

        j=i.firstChild;
        item=j.nodeValue.replace(/\s+$/,"").split(separator);

        if (i.childNodes.length>1) {
          for (var x=0; x<i.childNodes.length; x++) {
            if (i.childNodes[x].tagName && i.childNodes[x].tagName=="UL") {
              nestCount++;
              maxNest=Math.max(maxNest, nestCount);
              sc=subCount++;
              content+=parseListOption(sub, item[0], item[1]||item[0], "cs-sub-"+sc, item[2]||0);
              subContent+="\n"+parseList(sub, item[0], item[1]||item[0], "cs-sub-"+sc, item[2]||0, i.childNodes[x]);
              nestCount--;

              item=null;
              break;
            }
          }
        }
      }
      else if (i.tagName && i.tagName=="UL") {
        if (item!=null) {
          nestCount++;
          maxNest=Math.max(maxNest, nestCount);
          sc=subCount++;
          content+=parseListOption(sub, item[0], item[1]||item[0], "cs-sub-"+sc, item[2]||0);
          subContent+="\n"+parseList(sub, item[0], item[1]||item[0], "cs-sub-"+sc, item[2]||0, i);
          nestCount--;

          item=null;
        }
      }
    }
    i=i.nextSibling;
  }

  if (item!=null) {
    content+=parseOption(sub, item[0], item[1]||item[0], item[2]||0);
  }

  return content+subContent;
}

function parseTop(list) {
  var content="", subContent="", sc, i=list.firstChild, item=null;

  while (i) {
    if (i.nodeType==1) {
      if (i.tagName && i.tagName=="LI") {
        if (item!=null) {
          content+=parseOption("cs-top", item[0], item[1]||item[0], item[2]||0);
        }

        j=i.firstChild;
        item=j.nodeValue.replace(/\s+$/,"").split(separator);

        if (i.childNodes.length>1) {
          for (var x=0; x<i.childNodes.length; x++) {
            if (i.childNodes[x].tagName && i.childNodes[x].tagName=="UL") {
              nestCount++;
              maxNest=Math.max(maxNest, nestCount);
              sc=subCount++;
              content+=parseListOption("cs-top", item[0], item[1]||item[0], "cs-sub-"+sc, item[2]||0);
              subContent+="\n"+parseList("cs-top", item[0], item[1]||item[0], "cs-sub-"+sc, item[2]||0, i.childNodes[x]);
              nestCount--;

              item=null;
              break;
            }
          }
        }
      }
      else if (i.tagName && i.tagName=="UL") {
        if (item!=null) {
          nestCount++;
          maxNest=Math.max(maxNest, nestCount);
          sc=subCount++;
          content+=parseListOption("cs-top", item[0], item[1]||item[0], "cs-sub-"+sc, item[2]||0);
          subContent+="\n"+parseList("cs-top", item[0], item[1]||item[0], "cs-sub-"+sc, item[2]||0, i);
          nestCount--;

          item=null;
        }
      }
    }
    i=i.nextSibling;
  }

  if (item!=null) {
    content+=parseOption("cs-top", item[0], item[1]||item[0], item[2]||0);
  }

  return content+subContent;
}

function parseGroup() {
  var content="", list=document.getElementById("CS"), listGroup=document.forms[0].listgroup.value;

  if (listGroup!="") {
    subCount=1;
    maxNest=1;
    nestCount=1;
    content='addListGroup("'+listGroup+'", "cs-top");'+"\n\n";
    content+=parseTop(list);

    document.forms[0].content.value=content;
  }
}

function showGroup() {
  if (document.forms[0].content.value!="") {
    demoWin=window.open();

    with (demoWin.document) {
      writeln('<script language="javascript" src="../chainedselects.js"></script>');
      writeln('<script language="javascript">');
    }

    demoWin.document.writeln(document.forms[0].content.value);
    demoWin.document.writeln('</script>');
    demoWin.document.write('<body onload="initListGroup('+"'"+document.forms[0].listgroup.value+"'");

    with (demoWin.document) {
      for (var i=1; i<=maxNest; i++) {
        write(", document.forms[0].s"+i);
      }
      writeln(')">');
      writeln("<form>");
      for (var i=1; i<=maxNest; i++) {
        writeln("<p><select style='width:200px;' name=s"+i+"></select></p>");
      }
      writeln("</form>");
      writeln("</body>");
    }
    demoWin.document.close();
  }
}