Jsを使用してFCKeditorエディタでコンテンツを取得、挿入、変更する。

<script type = "text/javascript" >
//"add/remove checkboxes" when clicked if the button is checked add "{#book#}" string to the FCK content, and vice versa remove the string
//lineBook is the ID number of FCK
function chk_but() {
  if (window.FCKeditorAPI ! == undefined && FCKeditorAPI.GetInstance('txtContent') ! == undefined) {
    if (document.getElementById('lineBook').checked) {
      FCKeditorAPI.GetInstance('txtContent').EditorDocument.body.innerHTML += "{#book#}";
    } else {
      FCKeditorAPI.GetInstance('txtContent').EditorDocument.body.innerHTML = FCKeditorAPI.GetInstance('txtContent').EditorDocument.body. innerHTML.replace("{#book#}", "");
    }
  }
} //end function chk_lineBook()
//check "Add/Remove checkboxes" if there is {#book#} in the content;
if (document.getElementById('txtContent').value.indexOf('{#book#}') >= 0 
  && window.FCKeditorAPI ! == undefined 
  && FCKeditorAPI.GetInstance('txtContent') ! == undefined) {
  document.getElementById('lineBook').checked = true;
} 
</script>

//Insert the specified code into the editor 
function insertHTMLToEditor(codeStr){ 
 var oEditor = FCKeditorAPI.GetInstance("content");
 InsertHtml(codeStr); // "html" for HTML text
}
// Get the HTML content in the editor
function getEditorHTMLContents() {
 var oEditor = FCKeditorAPI.GetInstance("content");
 return(oEditor.GetXHTML(false));
}
// Get the text content in the editor
function getEditorTextContents() {
 var oEditor = FCKeditorAPI.GetInstance("content");
 return(oEditor.EditorDocument.body.innerText);
}
// Set the contents of the editor
function SetEditorContents(ContentStr) {
 var oEditor = FCKeditorAPI.GetInstance("content") ;
 oEditor.SetHTML(ContentStr) ;
}
//Insert the specified code into the editor 
function insertHTMLToEditor(codeStr){ 
  var oEditor = FCKeditorAPI.GetInstance( "content "); 
  if (oEditor.EditMode==FCK_EDITMODE_WYSIWYG){ 
    InsertHtml(codeStr). oEditor; 
  }else{ 
    return false; 
  } 
} 
// count the number of words in the editor 
function getLength(){ 
  var oEditor = FCKeditorAPI.GetInstance( "content "); 
  var oDOM = oEditor.EditorDocument; 
  var iLength ; 
  if(document.all){ 
    iLength = oDOM.body.innerText.length; 
  }else{ 
    var r = oDOM.createRange(); 
    r.selectNodeContents(oDOM.body); 
    iLength = r.toString().length; 
  } 
  alert(iLength); 
} 
//Execute the specified action 
function ExecuteCommand(commandName){ 
  var oEditor = FCKeditorAPI.GetInstance( "content ") ; 
  GetCommand(commandName).Execute() ; 
}