/** 
* 
* The Globale Variables 
*/ 

if (!window.Node) { 
  var Node = {            // If there is no Node object, define one 
    ELEMENT_NODE: 1,    // with the following properties and values. 
    ATTRIBUTE_NODE: 2,  // Note that these are HTML node types only. 
    TEXT_NODE: 3,       // For XML-specific nodes, you need to add 
    COMMENT_NODE: 8,    // other constants here. 
    DOCUMENT_NODE: 9, 
    DOCUMENT_FRAGMENT_NODE: 11 
  } 
} 


var KEY_PAGEUP   = 33; 
var KEY_PAGEDOWN = 34; 
var KEY_END      = 35; 
var KEY_HOME     = 36; 

var KEY_LEFT     = 37; 
var KEY_UP       = 38; 
var KEY_RIGHT    = 39; 
var KEY_DOWN     = 40; 

var KEY_SPACE    = 32; 
var KEY_TAB      = 9; 

var KEY_BACKSPACE = 8; 
var KEY_DELETE    = 46; 
var KEY_ENTER     = 13; 
var KEY_INSERT    = 45; 
var KEY_ESCAPE    = 27; 

var KEY_F1        = 112; 
var KEY_F2        = 113; 
var KEY_F3        = 114; 
var KEY_F4        = 115; 
var KEY_F5        = 116; 
var KEY_F6        = 117; 
var KEY_F7        = 118; 
var KEY_F8        = 119; 
var KEY_F9        = 120; 
var KEY_F10       = 121; 

var KEY_M         = 77; 

var NS_XHTML = "http://www.w3.org/1999/xhtml" 
var NS_STATE = "http://www.w3.org/2005/07/aaa"; 

// ********************************************** 
// * 
// * Commonly used helper functions 
// * 
// ********************************************** 

/** 
* 
* nextSiblingElement 
* 
* @contructor 
*/ 

function nextSiblingElement( node ) { 

  var next_node = node.nextSibling; 

  while( next_node 
    && (next_node.nodeType != Node.ELEMENT_NODE) ) { 
    next_node = next_node.nextSibling; 
  }  // endwhile 

  return next_node; 
   
} 

/** 
* 
* previousSiblingElement 
* 
* @param ( node ) node object for which you are looking for the next sibling element node 
* 
* @return ( node) next sibling or "null" 
*/ 

function previousSiblingElement( node ) { 

  var next_node = node.previousSibling; 

  while( next_node 
    && (next_node.nodeType != Node.ELEMENT_NODE) ) { 
    next_node = next_node.previousSibling; 
  }  // endwhile 

  return next_node; 
   
} 

/** 
* 
* firstChildElement 
* 
* @param ( node ) node object for which you are looking for the first child element node 
* 
* @return ( node) next sibling or "null" 
*/ 

function firstChildElement( node ) { 

  var next_node = node.firstChild; 

  while( next_node 
    && (next_node.nodeType != Node.ELEMENT_NODE) ) { 
    next_node = next_node.nextSibling; 
  }  // endwhile 


  return next_node; 
   
} 

/** 
* 
* getTextContentOfNode 
* 
* @contructor 
*/ 

function getTextContentOfNode( node ) { 

  var next_node = node.firstChild; 
  var str = ""; 

  while( next_node ) { 
     
    if( (next_node.nodeType == Node.TEXT_NODE ) && 
      (next_node.length > 0 ) 
     ) 
      str += next_node.data; 
     
     
    next_node = next_node.nextSibling; 
     
  }  // endwhile 

  return str; 
   
} 

/** 
* 
* setTextContentOfNode 
* 
* @contructor 
*/ 

function setTextContentOfNode( node, text ) { 

   // Generate a new text node with the text value 
    var text_node = document.createTextNode(text); 
   
    // Remove child nodes to remove text 
    while (node.firstChild) { 
      node.removeChild(node.firstChild); 
    } // while 

    // Append new text to the container element 
    node.appendChild( text_node ); 

}