// Surrounds the selected text with text1 and text2.
function surroundText(text1, text2, textarea) {

 	// Can a text range be created?
	 if ( typeof(textarea.caretPos) != "undefined" && textarea.createTextRange ) {
		  
    var caretPos = textarea.caretPos, temp_length = caretPos.text.length;
    caretPos.text = caretPos.text.charAt(caretPos.text.length - 1) == ' ' ? text1 + caretPos.text + text2 + ' ' : text1 + caretPos.text + text2;

    if (temp_length == 0) {
      caretPos.moveStart("character", -text2.length);
      caretPos.moveEnd("character", -text2.length);
      caretPos.select();
    } else
			   textarea.focus(caretPos);
      
	 // Mozilla text range wrap.
  } else if (typeof(textarea.selectionStart) != "undefined") {
		  
    var begin = textarea.value.substr(0, textarea.selectionStart);
  		var selection = textarea.value.substr(textarea.selectionStart, textarea.selectionEnd - textarea.selectionStart);
  		var end = textarea.value.substr(textarea.selectionEnd);
  		var newCursorPos = textarea.selectionStart;
  		var scrollPos = textarea.scrollTop;
  
  		textarea.value = begin + text1 + selection + text2 + end;

  		if (textarea.setSelectionRange){
  			 if (selection.length == 0)
  				  textarea.setSelectionRange(newCursorPos + text1.length, newCursorPos + text1.length);
  			 else
  				  textarea.setSelectionRange(newCursorPos, newCursorPos + text1.length + selection.length + text2.length);
  			 textarea.focus();
  		}
		  textarea.scrollTop = scrollPos;
    
  // Just put them on the end, then.
	 } else	{
		  textarea.value += text1 + text2;
	 	 textarea.focus(textarea.value.length - 1);
	 }
  
}

// Replaces the currently selected text with the passed text.
function replaceText(text, textarea) {
  
  // Attempt to create a text range (IE).
  if (typeof(textarea.caretPos) != "undefined" && textarea.createTextRange) {
    var caretPos = textarea.caretPos;

    caretPos.text = caretPos.text.charAt(caretPos.text.length - 1) == ' ' ? text + ' ' : text;
    caretPos.select();
  
  // Mozilla text range replace.
  } else if (typeof(textarea.selectionStart) != "undefined") {
    var begin = textarea.value.substr(0, textarea.selectionStart);
    var end = textarea.value.substr(textarea.selectionEnd);
    var scrollPos = textarea.scrollTop;
    
    textarea.value = begin + text + end;
    
    if (textarea.setSelectionRange) {
      textarea.focus();
      textarea.setSelectionRange(begin.length + text.length, begin.length + text.length);
    }
    textarea.scrollTop = scrollPos;
  
  // Just put it on the end.
  } else {
    textarea.value += text;
    textarea.focus(textarea.value.length - 1);
  }
  
}

// Remember the current position.
function storeCaret(text) {

 	// Only bother if it will be useful.
	 if (typeof(text.createTextRange) != "undefined")
		  text.caretPos = document.selection.createRange().duplicate();

}

// Ein und ausblenden von Elementen
function switchView (id) {
  var obj;
  obj = document.getElementById(id);
  if (obj.style.display == 'none')
    obj.style.display = 'block';
  else
    obj.style.display = 'none';
}