function showPopUp(sImg){
 	var oImg = new Image();
 	var bLoaded;
 	oImg.src=sImg+'?'+randomnumber();
 	oImg.onload = function evt(){
	 	if (oImg.complete) {
	 		bLoaded=true 
	 	} 
	 	else {
	 		if (oImg.readyState == 'complete') {
	 			bLoaded=true 
	 		} 
	 	} 
	 	if(bLoaded){
	 		if(document.getElementById('divPopup')){hidePopup()}
			var iWidth=oImg.width;
			var iHeight=oImg.height;
			var oDiv = document.createElement('DIV');
			oDiv.id='divPopup';
			oDiv.style.position='absolute';
			var aScreenResolution = new retScreenResolution();
			oDiv.style.left=(aScreenResolution[0]/2)-(iWidth/2)-retBodyLeft()+'px';
			oDiv.style.top=(aScreenResolution[1]/2)-(iHeight/2)+'px';
			oDiv.style.width=iWidth+'px';
			oDiv.style.height=iHeight+'px';
			oDiv.style.zIndex=10;
			document.body.appendChild (oDiv);
	
			 if(document.getElementById('divPopup')){
				 oDiv.innerHTML='<a href="javascript:hidePopup()" title="Klik hier om de afbeelding te sluiten"><img src="'+sImg+'" title="Klik hier om te sluiten"/></a>';
				 var oClose = document.createElement('DIV');
				 oClose.id='divClose';
				 oClose.style.position='absolute';
				 document.body.appendChild (oClose);
				 oClose.innerHTML='<a id=\"popuplink\" href="javascript:hidePopup()" title="Klik hier om te sluiten">Sluiten</a>';
				 oClose.style.left=((oDiv.offsetLeft+oDiv.offsetWidth)-oClose.offsetWidth)-10+'px';
				 oClose.style.top=oDiv.offsetTop+5+'px';
				 oClose.style.zIndex=20;
			} 
	 	} 	
 	} 

} 
 

function popup(text) {
 	var bLoaded;
	if(document.getElementById('divPopup')){hidePopup()}
	var oDiv = document.createElement('DIV');	
	oDiv.id='divPopup';
	oDiv.style.position='absolute';
	var aScreenResolution = new retScreenResolution();
	oDiv.style.zIndex=10;
	document.body.appendChild (oDiv);

	if(document.getElementById('divPopup')){

	 	var oBox = document.createElement('DIV');	 	
		oBox.innerHTML=text;
		oDiv.appendChild (oBox);
		
		var iWidth=oBox.offsetWidth+100;
		var iHeight=oBox.offsetHeight+100;	
		oDiv.style.left=(aScreenResolution[0]/2)-(iWidth/2)-retBodyLeft()+'px';
		oDiv.style.top=(aScreenResolution[1]/2)-(iHeight/2)+'px';
		oDiv.style.width=iWidth+'px';
		oDiv.style.height=iHeight+'px';
		oDiv.style.lineHeight=iHeight+'px';
		oDiv.style.verticalAlign='middle';
		oDiv.style.textAlign='center';
		
		oBox.style.zIndex=20;
		
		var oClose = document.createElement('DIV');
		oClose.id='divClose';
		oClose.style.position='absolute';
		document.body.appendChild (oClose);
		oClose.innerHTML='<a id=\"popuplink\" href="javascript:hidePopup()" title="Klik hier om te sluiten"><img src="images/nav-stop.ico" alt="" /></a>';		
		oClose.style.left=((oDiv.offsetLeft+oDiv.offsetWidth)-oClose.offsetWidth)-5+'px';
		oClose.style.top=oDiv.offsetTop+5+'px';
		
		oClose.style.zIndex=30;
		
	} 
	
}


function retScreenResolution(){
	 var frameWidth = 0;
	 var frameHeight = 0;
	 if (self.innerWidth) {
	 	frameWidth = self.innerWidth;
		frameHeight = self.innerHeight;
	 } 
	 else if (document.documentElement && document.documentElement.clientWidth) {
	 	frameWidth = document.documentElement.clientWidth;
	 	frameHeight = document.documentElement.clientHeight;
	 } 
	 else if (document.body) {
	 	frameWidth = document.body.clientWidth;
	 	frameHeight = document.body.clientHeight;
	 } 
	 var aFrame = new Array(frameWidth, frameHeight);
	 return aFrame;
} 
 
function retBodyLeft(){
	var bodyLeft = 0;
	if (self.innerWidth) {
		bodyLeft = (self.innerWidth - document.body.offsetWidth) / 2;
	} 
	else if (document.documentElement && document.documentElement.clientWidth) {
		bodyLeft = document.body.offsetLeft;
	} 
	else if (document.body) {
		bodyLeft = document.body.offsetLeft;
	} 
	return bodyLeft;
}

function hidePopup(){ 		
	var oDiv = document.getElementById('divPopup');
	var oClose =  document.getElementById('divClose');
	if(oDiv){		
		document.body.removeChild(oDiv);
		document.body.removeChild(oClose);
	}
}



function movePopup(){
	
    var aScreenResolution = retScreenResolution(); 
    
	if(document.getElementById('divPopup')){
    document.getElementById('divPopup').style.left=(aScreenResolution[0]/2)-(document.getElementById('divPopup').offsetWidth/2)-retBodyLeft()+'px';
    document.getElementById('divPopup').style.top=(aScreenResolution[1]/2)-(document.getElementById('divPopup').offsetHeight/2)+'px';
    document.getElementById('divClose').style.left=((document.getElementById('divPopup').offsetLeft+document.getElementById('divPopup').offsetWidth)-document.getElementById('divClose').offsetWidth)-10+'px';
    document.getElementById('divClose').style.top=document.getElementById('divPopup').offsetTop+5+'px';    
	}
    	
}





function randomnumber() {
	return  Math.round((99977562 - 10016486) * Math.random() + 1) + 22423;
}