function deldialog(){
   if(window.confirm('削除してよろしいですか？')){return true;}
   else{return false;}
}

function expand(id){
   document.getElementById(id).style.display = "block";
}

function suspend(id){
   document.getElementById(id).style.display = "none";
}

function applyCSS(doc, cssfile, overwrite)
{
  if (typeof overwrite == "undefined")
    overwrite = 0;      // デフォルト:CSSの追加

  // 既存のCSSを削除
  if (overwrite && doc.styleSheets.length >= 1) {
    var links = doc.getElementsByTagName("link");
    for (var i = 0 ; i < links.length ; i++) {
      if (links[i].rel == "stylesheet")
        links[i].parentNode.removeChild(links[i]);
    }
  }

  // CSS追加
  if (document.all) {
    doc.createStyleSheet(cssfile);
  } else {
    var link = doc.createElement("link");
    link.rel = "stylesheet";
    link.href = cssfile;
    link.type = "text/css"
    doc.getElementsByTagName('head')[0].appendChild(link);
  }
}