var text_no_selected = "Выберите текст для вставки"; 
var clientPC = navigator.userAgent.toLowerCase(); 
var clientVer = parseInt(navigator.appVersion); 
var is_ie = ((clientPC.indexOf("msie") != -1) && (clientPC.indexOf("opera") == -1)); 
var is_nav = ((clientPC.indexOf('mozilla')!=-1) && (clientPC.indexOf('spoofer')==-1) 
                && (clientPC.indexOf('compatible') == -1) && (clientPC.indexOf('opera')==-1) 
                && (clientPC.indexOf('webtv')==-1) && (clientPC.indexOf('hotjava')==-1)); 
var is_moz = 0; 
var is_win = ((clientPC.indexOf("win")!=-1) || (clientPC.indexOf("16bit") != -1)); 
var is_mac = (clientPC.indexOf("mac")!=-1); 

function mozillaWr(textarea, open, close) 
         { 
       var selLength = textarea.textLength; 
      var selStart = textarea.selectionStart; 
     var selEnd = textarea.selectionEnd; 
      if (selEnd == 1 || selEnd == 2) 
         selEnd = selLength; 

     var s1 = (textarea.value).substring(0,selStart); 
     var s2 = (textarea.value).substring(selStart, selEnd) 
      var s3 = (textarea.value).substring(selEnd, selLength); 
     textarea.value = s1 + open + s2 + close + s3; 

     txtarea.selectionEnd = 0; 
     txtarea.selectionStart = selEnd + open.length + close.length; 
     return; 
         } 

function insert_into_position_cursor(text) 
         { 
        var textarea = document.post.message; 
     if (textarea.createTextRange && textarea.caretPos) 
        { 
           var caretPos = textarea.caretPos; 
        caretPos.text = caretPos.text.charAt(caretPos.text.length - 1) == ' ' ? caretPos.text + text + ' ' : caretPos.text + text; 
        } 
     else { 
           if (is_nav && document.getElementById) 
              { 
              mozillaWr(textarea, '', text); 
              } 
           else { textarea.value  += text; } 
          } 
     textarea.focus(); 
         } 

function copySelection() 
         { 
     if      (window.getSelection)   { selection = window.getSelection().toString();      } 
     else if (document.getSelection) { selection = document.getSelection();               } 
     else if (document.selection)      { selection = document.selection.createRange().text; } 
         } 

function pasteSelection() 
        { 
    if (selection) 
           { 
       insert_into_position_cursor('[_quote]' + selection + '[_/quote]\n'); 
       selection = ''; 
       document.post.message.focus(); 
       return; 
          } 
    else { alert(text_no_selected); return; } 
        } 


function codeSelection(text){ 
     insert_into_position_cursor(text); 
} 

function storeCaret(textEl){ 
     if (textEl.createTextRange) textEl.caretPos = document.selection.createRange().duplicate(); 
}