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diff --git a/assignment1/materials/Environmental Impact Assessment Course Module » 2-6 Summary_files/builder.js b/assignment1/materials/Environmental Impact Assessment Course Module » 2-6 Summary_files/builder.js
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+// script.aculo.us builder.js v1.8.1, Thu Jan 03 22:07:12 -0500 2008
+
+// Copyright (c) 2005-2007 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)
+//
+// script.aculo.us is freely distributable under the terms of an MIT-style license.
+// For details, see the script.aculo.us web site: http://script.aculo.us/
+
+var Builder = {
+  NODEMAP: {
+    AREA: 'map',
+    CAPTION: 'table',
+    COL: 'table',
+    COLGROUP: 'table',
+    LEGEND: 'fieldset',
+    OPTGROUP: 'select',
+    OPTION: 'select',
+    PARAM: 'object',
+    TBODY: 'table',
+    TD: 'table',
+    TFOOT: 'table',
+    TH: 'table',
+    THEAD: 'table',
+    TR: 'table'
+  },
+  // note: For Firefox < 1.5, OPTION and OPTGROUP tags are currently broken,
+  //       due to a Firefox bug
+  node: function(elementName) {
+    elementName = elementName.toUpperCase();
+    
+    // try innerHTML approach
+    var parentTag = this.NODEMAP[elementName] || 'div';
+    var parentElement = document.createElement(parentTag);
+    try { // prevent IE "feature": http://dev.rubyonrails.org/ticket/2707
+      parentElement.innerHTML = "<" + elementName + "></" + elementName + ">";
+    } catch(e) {}
+    var element = parentElement.firstChild || null;
+      
+    // see if browser added wrapping tags
+    if(element && (element.tagName.toUpperCase() != elementName))
+      element = element.getElementsByTagName(elementName)[0];
+    
+    // fallback to createElement approach
+    if(!element) element = document.createElement(elementName);
+    
+    // abort if nothing could be created
+    if(!element) return;
+
+    // attributes (or text)
+    if(arguments[1])
+      if(this._isStringOrNumber(arguments[1]) ||
+        (arguments[1] instanceof Array) ||
+        arguments[1].tagName) {
+          this._children(element, arguments[1]);
+        } else {
+          var attrs = this._attributes(arguments[1]);
+          if(attrs.length) {
+            try { // prevent IE "feature": http://dev.rubyonrails.org/ticket/2707
+              parentElement.innerHTML = "<" +elementName + " " +
+                attrs + "></" + elementName + ">";
+            } catch(e) {}
+            element = parentElement.firstChild || null;
+            // workaround firefox 1.0.X bug
+            if(!element) {
+              element = document.createElement(elementName);
+              for(attr in arguments[1]) 
+                element[attr == 'class' ? 'className' : attr] = arguments[1][attr];
+            }
+            if(element.tagName.toUpperCase() != elementName)
+              element = parentElement.getElementsByTagName(elementName)[0];
+          }
+        } 
+
+    // text, or array of children
+    if(arguments[2])
+      this._children(element, arguments[2]);
+
+     return element;
+  },
+  _text: function(text) {
+     return document.createTextNode(text);
+  },
+
+  ATTR_MAP: {
+    'className': 'class',
+    'htmlFor': 'for'
+  },
+
+  _attributes: function(attributes) {
+    var attrs = [];
+    for(attribute in attributes)
+      attrs.push((attribute in this.ATTR_MAP ? this.ATTR_MAP[attribute] : attribute) +
+          '="' + attributes[attribute].toString().escapeHTML().gsub(/"/,'&quot;') + '"');
+    return attrs.join(" ");
+  },
+  _children: function(element, children) {
+    if(children.tagName) {
+      element.appendChild(children);
+      return;
+    }
+    if(typeof children=='object') { // array can hold nodes and text
+      children.flatten().each( function(e) {
+        if(typeof e=='object')
+          element.appendChild(e)
+        else
+          if(Builder._isStringOrNumber(e))
+            element.appendChild(Builder._text(e));
+      });
+    } else
+      if(Builder._isStringOrNumber(children))
+        element.appendChild(Builder._text(children));
+  },
+  _isStringOrNumber: function(param) {
+    return(typeof param=='string' || typeof param=='number');
+  },
+  build: function(html) {
+    var element = this.node('div');
+    $(element).update(html.strip());
+    return element.down();
+  },
+  dump: function(scope) { 
+    if(typeof scope != 'object' && typeof scope != 'function') scope = window; //global scope 
+  
+    var tags = ("A ABBR ACRONYM ADDRESS APPLET AREA B BASE BASEFONT BDO BIG BLOCKQUOTE BODY " +
+      "BR BUTTON CAPTION CENTER CITE CODE COL COLGROUP DD DEL DFN DIR DIV DL DT EM FIELDSET " +
+      "FONT FORM FRAME FRAMESET H1 H2 H3 H4 H5 H6 HEAD HR HTML I IFRAME IMG INPUT INS ISINDEX "+
+      "KBD LABEL LEGEND LI LINK MAP MENU META NOFRAMES NOSCRIPT OBJECT OL OPTGROUP OPTION P "+
+      "PARAM PRE Q S SAMP SCRIPT SELECT SMALL SPAN STRIKE STRONG STYLE SUB SUP TABLE TBODY TD "+
+      "TEXTAREA TFOOT TH THEAD TITLE TR TT U UL VAR").split(/\s+/);
+  
+    tags.each( function(tag){ 
+      scope[tag] = function() { 
+        return Builder.node.apply(Builder, [tag].concat($A(arguments)));  
+      } 
+    });
+  }
+}