function isChanged() {

    var flg = false;

    var arr = document.forms[0].elements;     for(i = 0; i < arr.length; i ++ ) {         var elem = arr[i];         if(elem.type == "text" || elem.type == "textarea") {           if(elem.value != elem.defaultValue) {                flg = true;                break;           }         } else if(elem.type == "checkbox" || elem.type == "radio") {           if(elem.checked != elem.defaultChecked) {                flg = true;                break;           }        } else if(elem.type == "select-one") {               var children = elem.childNodes;               var defaultSelectedFlg = false;               // デフォルト選択状態のものがあるか確認する              for(j = 0; j < children.length; j++ ) {

                   if(children[j].tagName == 'OPTION') {

                        if(children[j].defaultSelected) {                              defaultSelectedFlg = true;                              break;                         }                    }               }

              // デフォルト選択状態のものがあった場合は、それと比較

              if(defaultSelectedFlg) {                    for(j = 0 ; j < children.length; j++ ) {                         if(children[j].tagName == 'OPTION') {                              if(children[j].selected != children[j].defaultSelected) {                                           flg = true;                                           break;                              }                         }                    }               } else {                    //デフォルト選択状態以外のものがあった場合は                   if(elem.selectedIndex > 0) {                         flg = true;                         break;                    }               }          }     }     return flg; }