// JavaScript Document
function HideContent(d) {
if(d.length < 1) { return; }
document.getElementById(d).style.display = "none";
}
function ShowContent(d) {
if(d.length < 1) { return; }
document.getElementById(d).style.display = "block";
}
function ReverseContentDisplay(d) {
if(d.length < 1) { return; }
if(document.getElementById(d).style.display == "none") { document.getElementById(d).style.display = "block"; }
else { document.getElementById(d).style.display = "none"; }
}

function grayOut(vis, options) {  
	// Pass true to gray out screen, false to ungray  
	// options are optional.  This is a JSON object with the following (optional) properties  
	// opacity:0-100         
	// Lower number = less grayout higher = more of a blackout   
	// zindex: #             
	// HTML elements with a higher zindex appear on top of the gray out  
	// bgcolor: (#xxxxxx)    
	// Standard RGB Hex color code  
	// grayOut(true, {'zindex':'50', 'bgcolor':'#0000FF', 'opacity':'70'});  
	// Because options is JSON opacity/zindex/bgcolor are all optional and can appear  
	// in any order.  Pass only the properties you need to set.  
	var options = options || {};   
	var zindex = options.zindex || 50;  
	var opacity = options.opacity || 50;  
	var opaque = (opacity / 100);  
	var bgcolor = options.bgcolor || '#000000';  
	var dark=document.getElementById('darkenScreenObject');  
	
	if (!dark) {    
		// The dark layer doesn't exist, it's never been created.  So we'll    
		// create it here and apply some basic styles.    
		// If you are getting errors in IE see: http://support.microsoft.com/default.aspx/kb/927917    
		var tbody = document.getElementsByTagName("body")[0];    
		var tnode = document.createElement('div');           
		// Create the layer.        
		tnode.style.position='absolute';                 
		// Position absolutely        
		tnode.style.top='0px';                           
		// In the top        
		tnode.style.left='0px';                          
		// Left corner of the page        
		tnode.style.overflow='hidden';                   
		// Try to avoid making scroll bars                    
		tnode.style.display='none';                      
		// Start out Hidden        
		tnode.id='darkenScreenObject';                   
		// Name it so we can find it later    
		tbody.appendChild(tnode);                            
		// Add it to the web page    
		dark=document.getElementById('darkenScreenObject');  
		// Get the object.  
	}  
	if (vis) {    
		// Calculate the page width and height     
		if( document.body && ( document.body.scrollWidth || document.body.scrollHeight ) ) {        
			var pageWidth = document.body.scrollWidth+'px';       
			var pageHeight = document.body.scrollHeight+'px';    
		} else if ( document.body.offsetWidth ) {      
			var pageWidth = document.body.offsetWidth+'px';      
			var pageHeight = document.body.offsetHeight+'px';    
		} else {       
			var pageWidth='100%';       
			var pageHeight='100%';    
		}      
		//set the shader to cover the entire page and make it visible.    
		dark.style.opacity=opaque;                          
		dark.style.MozOpacity=opaque;                       
		dark.style.filter='alpha(opacity='+opacity+')';     
		dark.style.zIndex=zindex;            
		dark.style.backgroundColor=bgcolor;      
		dark.style.width= pageWidth;    
		dark.style.height= pageHeight;    
		dark.style.display='block';                            
	} else {     
		dark.style.display='none';  
	}
}

function popup(vis,options) {
	var afbeelding_laden = "http://www.sempergaudete.nl/images/gif/fotogalerij_afbeelding_laden.gif";
	var afbeelding_sluiten = "http://www.sempergaudete.nl/images/gif/fotogalerij_afbeelding_sluiten.gif";
	var options = options || {};   
	var img = options.img || "";  
	var zindex = options.zindex || 60;  
	var popupwidth = options.popupwidth || 400;
	var popupheight = options.popupheight || 400;
	var popupbgcolor = options.bgcolor || 'transparent';  
  var popuptop = options.top || 0;
	var popupalign = options.align || 'middle';
	var popuptext = options.text || '';
	
	var imageObject = new Image();
	imageObject.src = img;
		
	var popupHTML = '';
	//popupHTML = popupHTML + '<div align="right" style="z-index:100;"><a href="#" onclick="grayOut(false); popup(false); return false;"><img name="closeImage" src="'+afbeelding_sluiten+'" border="0" /></a></div>';
	popupHTML = popupHTML + '<table width="50" border="0" cellpadding="10" cellspacing="10"><tr><td class="cms_dia_border"><a href="#" onclick="grayOut(false); popup(false); return false;"><img name="popupImage" alt="Klik op de afbeelding om te sluiten" src="'+afbeelding_laden+'" border="0" /></a></td></tr><tr><td class="cms_dia_bijschrift"><div align="center">'+popuptext+'</div></td></tr></table>';
	
  // tot aan hier editen, niet verder
	var popuplayer=document.getElementById('popupObject');  
	
	if (!popuplayer) {    
		// The  layer doesn't exist, it's never been created.  So we'll    
		// create it here and apply some basic styles.    
		// If you are getting errors in IE see: http://support.microsoft.com/default.aspx/kb/927917    
		var tbody = document.getElementsByTagName("body")[0];    
		var tnode = document.createElement('div');           
		// Create the layer.        
		tnode.style.position='absolute';                 
		// Position absolutely        
		tnode.style.top=popuptop+'px';                           
		// In the top        
		tnode.style.left='0px';                          
		// Left corner of the page        
		tnode.style.overflow='hidden';                   
		// Try to avoid making scroll bars                    
		tnode.style.display='none';                      
		// Start out Hidden        
		tnode.id='popupObject';                   
		// Name it so we can find it later    
		tbody.appendChild(tnode);                            
		// Add it to the web page    
		popuplayer=document.getElementById('popupObject');  
		// Get the object.  
	  tnode.innerHTML = popupHTML;
	} 
	
	document.getElementById('popupImage').src = imageObject.src;
	
	if (vis) {    
		// Calculate the page width and height     
		if( document.body && ( document.body.scrollWidth || document.body.scrollHeight ) ) {        
			var pageWidth = document.body.scrollWidth;       
			var pageHeight = document.body.scrollHeight; 
		} else if ( document.body.offsetWidth ) {      
			var pageWidth = document.body.offsetWidth;      
			var pageHeight = document.body.offsetHeight;    
		} else {       
			var pageWidth='1024';       
			var pageHeight='768';    
		}      
		//set the shader to cover the entire page and make it visible.    
    popuplayer.style.left=((pageWidth-popupwidth)/2);
		popuplayer.style.zIndex=zindex;            
		popuplayer.style.backgroundColor=popupbgcolor;      
		popuplayer.style.width= popupwidth;    
		popuplayer.style.height= popupheight;    
		popuplayer.style.display='block';                            
	} else {     
		popuplayer.style.display='none';  
	}
}