(function(){var NAMESPACE='log';var IE6_POSITION_FIXED=true;var bbird;var outputList;var cache=[];var state=getState();var classes={};var profiler={};var IDs={blackbird:'blackbird',checkbox:'bbVis',filters:'bbFilters',controls:'bbControls',size:'bbSize'}
var messageTypes={debug:true,info:true,warn:true,error:true,profile:true};function generateMarkup(){var spans=[];for(type in messageTypes){spans.push(['<span class="',type,'" type="',type,'"></span>'].join(''));}
var newNode=document.createElement('DIV');newNode.id=IDs.blackbird;newNode.style.display='none';newNode.innerHTML=['<div class="header">','<div class="left">','<div id="',IDs.filters,'" class="filters" title="click to filter by message type">',spans.join(''),'</div>','</div>','<div class="right">','<div id="',IDs.controls,'" class="controls">','<span id="',IDs.size,'" title="contract" op="resize"></span>','<span class="clear" title="clear" op="clear"></span>','<span class="close" title="close" op="close"></span>','</div>','</div>','</div>','<div class="main">','<div class="left"></div><div class="mainBody">','<ol>',cache.join(''),'</ol>','</div><div class="right"></div>','</div>','<div class="footer">','<div class="left"><label for="',IDs.checkbox,'"><input type="checkbox" id="',IDs.checkbox,'" />Visible on page load</label></div>','<div class="right"></div>','</div>'].join('');return newNode;}
function backgroundImage(){var bodyTag=document.getElementsByTagName('BODY')[0];if(bodyTag.currentStyle&&IE6_POSITION_FIXED){if(bodyTag.currentStyle.backgroundImage=='none'){bodyTag.style.backgroundImage='url(about:blank)';}
if(bodyTag.currentStyle.backgroundAttachment=='scroll'){bodyTag.style.backgroundAttachment='fixed';}}}
function addMessage(type,content){content=(content.constructor==Array)?content.join(''):content;if(outputList){var newMsg=document.createElement('LI');newMsg.className=type;newMsg.innerHTML=['<span class="icon"></span>',content].join('');outputList.appendChild(newMsg);scrollToBottom();}else{cache.push(['<li class="',type,'"><span class="icon"></span>',content,'</li>'].join(''));}}
function clear(){outputList.innerHTML='';}
function clickControl(evt){if(!evt)evt=window.event;var el=(evt.target)?evt.target:evt.srcElement;if(el.tagName=='SPAN'){switch(el.getAttributeNode('op').nodeValue){case'resize':resize();break;case'clear':clear();break;case'close':hide();break;}}}
function clickFilter(evt){if(!evt)evt=window.event;var span=(evt.target)?evt.target:evt.srcElement;if(span&&span.tagName=='SPAN'){var type=span.getAttributeNode('type').nodeValue;if(evt.altKey){var filters=document.getElementById(IDs.filters).getElementsByTagName('SPAN');var active=0;for(entry in messageTypes){if(messageTypes[entry])active++;}
var oneActiveFilter=(active==1&&messageTypes[type]);for(var i=0;filters[i];i++){var spanType=filters[i].getAttributeNode('type').nodeValue;filters[i].className=(oneActiveFilter||(spanType==type))?spanType:spanType+'Disabled';messageTypes[spanType]=oneActiveFilter||(spanType==type);}}
else{messageTypes[type]=!messageTypes[type];span.className=(messageTypes[type])?type:type+'Disabled';}
var disabledTypes=[];for(type in messageTypes){if(!messageTypes[type])disabledTypes.push(type);}
disabledTypes.push('');outputList.className=disabledTypes.join('Hidden ');scrollToBottom();}}
function clickVis(evt){if(!evt)evt=window.event;var el=(evt.target)?evt.target:evt.srcElement;state.load=el.checked;setState();}
function scrollToBottom(){outputList.scrollTop=outputList.scrollHeight;}
function isVisible(){return(bbird.style.display=='block');}
function hide(){bbird.style.display='none';}
function show(){var body=document.getElementsByTagName('BODY')[0];body.removeChild(bbird);body.appendChild(bbird);bbird.style.display='block';}
function reposition(position){if(position===undefined||position==null){position=(state&&state.pos===null)?1:(state.pos+1)%4;}
switch(position){case 0:classes[0]='bbBottomLeft';break;case 1:classes[0]='bbBottomLeft';break;case 2:classes[0]='bbBottomLeft';break;case 3:classes[0]='bbBottomLeft';break;}
state.pos=position;setState();}
function resize(size){if(size===undefined||size===null){size=(state&&state.size==null)?0:(state.size+1)%2;}
classes[1]=(size===0)?'bbSmall':'bbLarge'
var span=document.getElementById(IDs.size);span.title=(size===1)?'small':'large';span.className=span.title;state.size=size;setState();scrollToBottom();}
function setState(){var props=[];for(entry in state){var value=(state[entry]&&state[entry].constructor===String)?'"'+state[entry]+'"':state[entry];props.push(entry+':'+value);}
props=props.join(',');var expiration=new Date();expiration.setDate(expiration.getDate()+14);document.cookie=['blackbird={',props,'}; expires=',expiration.toUTCString(),';'].join('');var newClass=[];for(word in classes){newClass.push(classes[word]);}
bbird.className=newClass.join(' ');}
function getState(){var re=new RegExp(/blackbird=({[^;]+})(;|\b|$)/);var match=re.exec(document.cookie);return(match&&match[1])?eval('('+match[1]+')'):{pos:null,size:null,load:null};}
function readKey(evt){if(!evt)evt=window.event;var code=113;if(evt&&evt.keyCode==code){var visible=isVisible();if(visible&&evt.shiftKey&&evt.altKey)clear();else if(visible&&evt.shiftKey)reposition();else if(!evt.shiftKey&&!evt.altKey){(visible)?hide():show();}}}
function addEvent(obj,type,fn){var obj=(obj.constructor===String)?document.getElementById(obj):obj;if(obj.attachEvent){obj['e'+type+fn]=fn;obj[type+fn]=function(){obj['e'+type+fn](window.event)};obj.attachEvent('on'+type,obj[type+fn]);}else obj.addEventListener(type,fn,false);}
function removeEvent(obj,type,fn){var obj=(obj.constructor===String)?document.getElementById(obj):obj;if(obj.detachEvent){obj.detachEvent('on'+type,obj[type+fn]);obj[type+fn]=null;}else obj.removeEventListener(type,fn,false);}
window[NAMESPACE]={toggle:function(){(isVisible())?hide():show();},resize:function(){resize();},clear:function(){clear();},move:function(){reposition();},debug:function(msg){addMessage('debug',msg);},warn:function(msg){addMessage('warn',msg);},info:function(msg){addMessage('info',msg);},error:function(msg){addMessage('error',msg);},profile:function(label){var currentTime=new Date();if(label==undefined||label==''){addMessage('error','<b>ERROR:</b> Please specify a label for your profile statement');}
else if(profiler[label]){addMessage('profile',[label,': ',currentTime-profiler[label],'ms'].join(''));delete profiler[label];}
else{profiler[label]=currentTime;addMessage('profile',label);}
return currentTime;}}
addEvent(window,'load',function(){var body=document.getElementsByTagName('BODY')[0];bbird=body.appendChild(generateMarkup());outputList=bbird.getElementsByTagName('OL')[0];backgroundImage();addEvent(IDs.checkbox,'click',clickVis);addEvent(IDs.filters,'click',clickFilter);addEvent(IDs.controls,'click',clickControl);addEvent(document,'keyup',readKey);resize(state.size);reposition(state.pos);if(state.load){show();document.getElementById(IDs.checkbox).checked=true;}
scrollToBottom();window[NAMESPACE].init=function(){show();window[NAMESPACE].error(['<b>',NAMESPACE,'</b> can only be initialized once']);}
addEvent(window,'unload',function(){removeEvent(IDs.checkbox,'click',clickVis);removeEvent(IDs.filters,'click',clickFilter);removeEvent(IDs.controls,'click',clickControl);removeEvent(document,'keyup',readKey);});});})();