ba-domreplace.js

/*!
 * JavaScript domReplace - v1.0pre - 11/18/2009
 * http://benalman.com/projects/javascript-dom-replace/
 * 
 * Copyright (c) 2009 "Cowboy" Ben Alman
 * Dual licensed under the MIT and GPL licenses.
 * http://benalman.com/about/license/
 */

// jQuery not required:
// 
// Usage:
// 
//   domReplace( document.body, /\bthe\b/ig, 'THE' );
//   domReplace( document.body, /\b(the)\b/ig, function(a) { return '<strong>' + a + '<\/strong>'; }, true );

window.domReplace = (function(){
  
  var elem;
  
  return function( parent, search, replace, parse_html ) {
    
    var children = parent.childNodes,
      i = children.length,
      child,
      html;
    
    while( --i >= 0 ) {
      child = children[ i ];
      
      if ( child.nodeType === 3 ) {
        html = child.nodeValue.replace( search, replace );
        
        if ( html !== child.nodeValue ) {
          
          if ( parse_html ) {
            
            elem = elem || document.createElement('b');
            elem.innerHTML = html;
            
            while ( elem_child = elem.firstChild ) {
              parent.insertBefore( elem_child, child );
            }
            parent.removeChild( child );
            
          } else {
            child.nodeValue = html;
          }
        }
      } else {
        domReplace( child, search, replace, parse_html );
      }
    }
  };
  
})();

// And jQuery support is here if you have jQuery:
// 
// Usage:
// 
//   $('body').domReplace( /\bthe\b/ig, 'THE' );
//   $('body').domReplace( /\b(the)\b/ig, function(a) { return '<strong>' + a + '<\/strong>'; }, true );

if ( window.jQuery ) {
  
  jQuery.fn.domReplace = function( search, replace, parse_html ) {
    return this.each(function(){
      domReplace( this, search, replace, parse_html );
    });
  };
  
}