var xmlHttp

scherm_breed=screen.width
scherm_hoog=screen.height

/*==========================================================================================================*/
function showdeadcenterdiv(Xwidth,Yheight,divid) { 
// First, determine how much the visitor has scrolled

var scrolledX, scrolledY; 
if( self.pageYOffset ) { 
scrolledX = self.pageXOffset; 
scrolledY = self.pageYOffset; 
} else if( document.documentElement && document.documentElement.scrollTop ) { 
scrolledX = document.documentElement.scrollLeft; 
scrolledY = document.documentElement.scrollTop; 
} else if( document.body ) { 
scrolledX = document.body.scrollLeft; 
scrolledY = document.body.scrollTop; 
}

// Next, determine the coordinates of the center of browser's window

var centerX, centerY; 
if( self.innerHeight ) { 
centerX = self.innerWidth; 
centerY = self.innerHeight; 
} else if( document.documentElement && document.documentElement.clientHeight ) { 
centerX = document.documentElement.clientWidth; 
centerY = document.documentElement.clientHeight; 
} else if( document.body ) { 
centerX = document.body.clientWidth; 
centerY = document.body.clientHeight; 
}

// Xwidth is the width of the div, Yheight is the height of the 
// div passed as arguments to the function: 
var leftOffset = scrolledX + (centerX - Xwidth) / 2; 
var topOffset = scrolledY + (centerY - Yheight) / 2; 
// The initial width and height of the div can be set in the 
// style sheet with display:none; divid is passed as an argument to // the function 
var o=document.getElementById(divid); 
var r=o.style; 
r.position='absolute'; 
r.top = topOffset + 'px'; 
r.left = leftOffset + 'px'; 
r.display = "block"; 
} 
/*==========================================================================================================*/
function welkom_plaatje_1_zichtbaar()
{
	document.getElementById("plaatje_1").style.visibility='visible';
}
function welkom_plaatje_1_onzichtbaar()
{
	document.getElementById("plaatje_1").style.visibility='hidden';
}

function welkom_plaatje_2_zichtbaar()
{
	document.getElementById("plaatje_2").style.visibility='visible';
}
function welkom_plaatje_2_onzichtbaar()
{
	document.getElementById("plaatje_2").style.visibility='hidden';
}

function welkom_plaatje_3_zichtbaar()
{
	document.getElementById("plaatje_3").style.visibility='visible';
}
function welkom_plaatje_3_onzichtbaar()
{
	document.getElementById("plaatje_3").style.visibility='hidden';
}

function welkom_plaatje_4_zichtbaar()
{
	document.getElementById("plaatje_4").style.visibility='visible';
}
function welkom_plaatje_4_onzichtbaar()
{
	document.getElementById("plaatje_4").style.visibility='hidden';
}

function welkom_plaatje_5_zichtbaar()
{
	document.getElementById("plaatje_5").style.visibility='visible';
}
function welkom_plaatje_5_onzichtbaar()
{
	document.getElementById("plaatje_5").style.visibility='hidden';
}

function welkom_streep_zichtbaar()
{
	document.getElementById("streep").style.display='block';
}
function welkom_streep_onzichtbaar()
{
	document.getElementById("streep").style.display='none';
}
/*======================================================================*/
var start_paars_zichtbaar=0;

function div_over_zichtbaar(a,b)
{
	if (start_paars_zichtbaar==0)
	{
		start_paars_zichtbaar=1;
		document.getElementById(a).style.display='none';
	}
		document.getElementById(b).style.display='block';

}
function div_over_onzichtbaar(a,b)
{
	
	if (start_paars_zichtbaar==1)
	{
		start_paars_zichtbaar=0;
		document.getElementById(a).style.display='block';
	}
	document.getElementById(b).style.display='none';
	
}
/*==========================================================================================================*/
function underline_zichtbaar(a)
{
	document.getElementById(a).style.textDecoration='underline';
}
function underline_onzichtbaar(a)
{
	document.getElementById(a).style.textDecoration='none';
}



function foto(welke,album)
{
		/*alert("Aan deze functie wordt gewerkt." + welke + "-" + album);*/

/*		xmlHttp=GetXmlHttpObject()
		if (xmlHttp==null)
		 {
		 alert ("Browser does not support HTTP Request")
		 return
		 } 
		var url="../fotoalbum/de_foto.php"
		url=url+"?gegevens=" + welke + "^^" + album
		url=url+"&sid="+Math.random()
			xmlHttp.onreadystatechange=stateChanged		
		xmlHttp.open("GET",url,true)
		xmlHttp.send(null)			
*/
/*=========================*/
	xmlhttp=GetXmlHttpObject();

    if (xmlhttp==null)
	{
          alert ("Your browser does not support XMLHTTP!")
      return;
    }	
	var url="fotoalbum/de_foto.php"
		url=url+"?gegevens=" + welke + "^^" + album
		url=url+"&sid="+Math.random()
    xmlhttp.onreadystatechange= function() 
	{ 
		if (xmlhttp.readyState==4)
		{
          document.getElementById('main').innerHTML=xmlhttp.responseText
  		}
    }  
 
 
xmlhttp.open("GET",url,true);
    xmlhttp.send(null);			








}




function foto_2010(welke,album)
{
		xmlHttp=GetXmlHttpObject()
		if (xmlHttp==null)
		 {
		 alert ("Browser does not support HTTP Request")
		 return
		 } 
		var url="../2009_a_scripts/de_foto.php"
		url=url+"?gegevens=" + welke + "^^" + album
		url=url+"&sid="+Math.random()
		/*alert(welke_id)*/
			xmlHttp.onreadystatechange=stateChanged		
		xmlHttp.open("GET",url,true)
		xmlHttp.send(null)			
}
/*=======================================================================*/
function GetXmlHttpObject()
{ 
var objXMLHttp=null
if (window.XMLHttpRequest)
 {
 objXMLHttp=new XMLHttpRequest()
 }
else if (window.ActiveXObject)
 {
 objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")
 }
return objXMLHttp
}

/*==========================================================================================================*/