var dataTools=new dataTools();

// Add an extends - function to the objects 
// so that we have proper inheritance
Object.prototype.extends = function (oSuper) { 
       for (sProperty in oSuper) { 
	       this[sProperty] = oSuper[sProperty]; 
       } 
}

function dataTools(){
	var m_pkey=0;
	this.getNewPKey=getNewPKey;
	this.setPKey=setPKey;
	this.urlArgs=new urlArgs();
	this.getCookie=getCookie;
	this.setCookie=setCookie;
	this.imageDom=imageDom;
	function getNewPKey(){
		return(m_pkey++);
	}
	function setPKey(inPKey){
		m_pkey=inPKey;
	}

	function urlArgs(){
		var m_allPairs=window.location.search.substring(1).split("&");
		this.getValueByKey=getValueByKey;
		function getValueByKey(key){
			for (var i=0;i<m_allPairs.length;i++){
				var theKey,theValue;
				theKey=m_allPairs[i].split("=")[0];
				theValue=m_allPairs[i].split("=")[1];
				if (key==theKey) {
					return(theValue);
				}
			}
		}
	}

	// setCookie and getCookie copied from w3schools
	function setCookie(c_name,value,expiredays)
	{
		var exdate=new Date();
		exdate.setDate(exdate.getDate()+expiredays);
		document.cookie=c_name+ "=" +escape(value)+
		((expiredays==null) ? "" : ";expires="+exdate.toGMTString());
	}

	function getCookie(c_name)
	{
	if (document.cookie.length>0)
	  {
	  c_start=document.cookie.indexOf(c_name + "=");
	  if (c_start!=-1)
	    { 
	    c_start=c_start + c_name.length+1; 
	    c_end=document.cookie.indexOf(";",c_start);
	    if (c_end==-1) c_end=document.cookie.length;
	    return unescape(document.cookie.substring(c_start,c_end));
	    } 
	  }
	return "";
	}

	function imageDom(imgFile,altText,titleText){
		var imgNode=document.createElement("img");
		imgNode.setAttribute("src",imgFile);
		imgNode.setAttribute("alt",altText);
		imgNode.setAttribute("title",titleText);
		return(imgNode);
	}
}

// Subscription-service for Document-Click
document.extends(new Publisher);
document.onclick=onDocumentClick;

function onDocumentClick(event){
	if ("HTML"==event.target.nodeName) {
		document.notifySubscribers(document,"clicked",null)
	}
}