/*
Header slide script
Script copyright NetFiesta ICT Solutions (http://www.netfiesta.nl)
*/
var curpos=0
var busy=0
var curcanvas="canvas0"
var current_canvas = "canvas0"
var curcanvas_home="canvas_home"
var current_canvas_home = "canvas_home"
var referentieLoaded=0
function fadepic(nextimage) {
 if(busy==0) {
  if(current_canvas=="canvas0") {
   current_canvas = "canvas1"
   curcanvas = "canvas0"
   nextcanvas = "canvas1"
  }
  else {
   current_canvas = "canvas0"
   curcanvas = "canvas1"
   nextcanvas = "canvas0"
  }
  document.getElementById("canvas_home0").style.zIndex=document.getElementById(nextcanvas).style.zIndex;
  document.getElementById("canvas_home1").style.zIndex=document.getElementById(nextcanvas).style.zIndex;
  document.getElementById(curcanvas).style.zIndex=5;
  document.getElementById(nextcanvas).style.zIndex=15;
  document.getElementById(nextcanvas).style.visibility="visible";
  document.getElementById(nextcanvas).innerHTML = "<img src="+nextimage+" border='0' alt='' />";
  doFade()
 }
 else {
  setTimeout('fadepic(\''+nextimage+'\')',1000);
 }
}
function fadepic_homepage(nextimage) {
 if(busy==0) {
  if(current_canvas_home=="canvas_home0") {
   current_canvas_home = "canvas_home1"
   curcanvas_home = "canvas_home0"
   nextcanvas_home = "canvas_home1"
  }
  else {
   current_canvas_home = "canvas_home0"
   curcanvas_home = "canvas_home1"
   nextcanvas_home = "canvas_home0"
  }
  document.getElementById(curcanvas_home).style.zIndex=15;
  document.getElementById(nextcanvas_home).style.zIndex=25;
  document.getElementById(nextcanvas_home).style.visibility="visible";
  document.getElementById(nextcanvas_home).innerHTML = "<img src="+nextimage+" border='0' alt='' />";
  doFade_home()
 }
 else {
  setTimeout('fadepic_homepage(\''+nextimage+'\')',1000);
 }
}
function doFade() {
 if(curpos<100){
  busy=1
  curpos+=5
  if (document.getElementById(nextcanvas).filters) {
   document.getElementById(nextcanvas).filters.alpha.opacity=curpos
   setTimeout("doFade()",0)
  }
  else if (document.getElementById(nextcanvas).style.MozOpacity) {
   document.getElementById(nextcanvas).style.MozOpacity=curpos/101
   setTimeout("doFade()",0)
  }
 }
 else {
  busy=0;
  curpos=0;
  document.getElementById(curcanvas).filters.alpha.opacity=1
  document.getElementById(curcanvas).style.MozOpacity=0.01
  document.getElementById(curcanvas).style.visibility="hidden";
  document.getElementById("canvas_home0").style.visibility="hidden";
  document.getElementById("canvas_home1").style.visibility="hidden";
 }
}
function doFade_home() {
 if(curpos<100){
  busy=1
  curpos+=5
  if (document.getElementById(nextcanvas_home).filters) {
   document.getElementById(nextcanvas_home).filters.alpha.opacity=curpos
   setTimeout("doFade_home()",0)
  }
  else if (document.getElementById(nextcanvas_home).style.MozOpacity) {
   document.getElementById(nextcanvas_home).style.MozOpacity=curpos/101
   setTimeout("doFade_home()",0)
  }
 }
 else {
  busy=0;
  curpos=0;
  document.getElementById(curcanvas_home).filters.alpha.opacity=1
  document.getElementById(curcanvas_home).style.MozOpacity=0.01
  document.getElementById(curcanvas_home).style.visibility="hidden";
 }
}
function referentieMenu(direction, button) {
 menuobject = document.getElementById('referentie_menu');
 if((parseInt(menuobject.style.top)<=4 || parseInt(menuobject.style.top)>=172) && (busy==0 || window.content.location.href.substring(window.content.location.href.length-21,window.content.location.href.length)=="home.asp?section=home")) {
 if(direction=="up") {
  if(button!='true') {
   document.getElementById('referentie_button').src=document.getElementById('referentie_button').src.substring(0, document.getElementById('referentie_button').src.length-7)+'on.jpg';
  }
  fadeMenuUp();
 }
 else if(direction=="down") {
  if(button!='true') {
   if(document.getElementById('referentie_button').src.substring(document.getElementById('referentie_button').src.length-7, document.getElementById('referentie_button').src.length)=='_on.jpg') {
	document.getElementById('referentie_button').src=document.getElementById('referentie_button').src.substring(0, document.getElementById('referentie_button').src.length-6)+'off.jpg';
   }
   else {
    document.getElementById('referentie_button').src=document.getElementById('referentie_button').src.substring(0, document.getElementById('referentie_button').src.length-7)+'off.jpg';
   }
  }
  prefadeMenuDown();
 }
}
}
function fadeMenuUp() {
 if(parseInt(menuobject.style.top)>3) {
  menuobject.style.top=(parseInt(menuobject.style.top)-10)+'px';
  setTimeout("fadeMenuUp()",20)
 }
 else {
  setTimeout('fadeIn("button5")', 0)
  setTimeout('fadeIn("button5")', 100)
  setTimeout('fadeIn("button5")', 200)
  setTimeout('fadeIn("button5")', 300)
  setTimeout('fadeIn("button4")', 100)
  setTimeout('fadeIn("button4")', 200)
  setTimeout('fadeIn("button4")', 300)
  setTimeout('fadeIn("button4")', 400)
  setTimeout('fadeIn("button6")', 200)
  setTimeout('fadeIn("button6")', 300)
  setTimeout('fadeIn("button6")', 400)
  setTimeout('fadeIn("button6")', 500)
  setTimeout('fadeIn("button3")', 300)
  setTimeout('fadeIn("button3")', 400)
  setTimeout('fadeIn("button3")', 500)
  setTimeout('fadeIn("button3")', 600)
  setTimeout('fadeIn("button2")', 400)
  setTimeout('fadeIn("button2")', 500)
  setTimeout('fadeIn("button2")', 600)
  setTimeout('fadeIn("button2")', 700)
  setTimeout('fadeIn("button1")', 500)
  setTimeout('fadeIn("button1")', 600)
  setTimeout('fadeIn("button1")', 700)
  setTimeout('fadeIn("button1")', 800)
 }
}
function prefadeMenuDown() {
  setTimeout('fadeOut("button1")', 100)
  setTimeout('fadeOut("button1")', 200)
  setTimeout('fadeOut("button1")', 300)
  setTimeout('fadeOut("button1")', 400)
  setTimeout('fadeOut("button2")', 200)
  setTimeout('fadeOut("button2")', 300)
  setTimeout('fadeOut("button2")', 400)
  setTimeout('fadeOut("button2")', 500)
  setTimeout('fadeOut("button3")', 300)
  setTimeout('fadeOut("button3")', 400)
  setTimeout('fadeOut("button3")', 500)
  setTimeout('fadeOut("button3")', 600)
  setTimeout('fadeOut("button6")', 400)
  setTimeout('fadeOut("button6")', 500)
  setTimeout('fadeOut("button6")', 600)
  setTimeout('fadeOut("button6")', 700)
  setTimeout('fadeOut("button4")', 500)
  setTimeout('fadeOut("button4")', 600)
  setTimeout('fadeOut("button4")', 700)
  setTimeout('fadeOut("button4")', 800)
  setTimeout('fadeOut("button5")', 600)
  setTimeout('fadeOut("button5")', 700)
  setTimeout('fadeOut("button5")', 800)
  setTimeout('fadeOut("button5")', 900)
  setTimeout('fadeMenuDown()', 800)
}
function fadeMenuDown() {
 if(parseInt(menuobject.style.top)<173) {
  menuobject.style.top=(parseInt(menuobject.style.top)+10)+'px';
  setTimeout("fadeMenuDown()",20)
 }
}
function fadeIn(button_naam) {
 if(document.getElementById(button_naam).filters) {
  document.getElementById(button_naam).filters.alpha.opacity=document.getElementById(button_naam).filters.alpha.opacity+25;
 }
 else if(document.getElementById(button_naam).style.MozOpacity) {
  if(parseFloat(document.getElementById(button_naam).style.MozOpacity) < 1.25) {
   document.getElementById(button_naam).style.MozOpacity=parseFloat(document.getElementById(button_naam).style.MozOpacity)+0.25;
  }
 }
}
function fadeOut(button_naam) {
 if(document.getElementById(button_naam).filters) {
  document.getElementById(button_naam).filters.alpha.opacity=document.getElementById(button_naam).filters.alpha.opacity-25;
 }
 else if(document.getElementById(button_naam).style.MozOpacity) {
  if(parseFloat(document.getElementById(button_naam).style.MozOpacity) > -0.25) {
   document.getElementById(button_naam).style.MozOpacity=parseFloat(document.getElementById(button_naam).style.MozOpacity)-0.25;
  }
 }
}
function startReferentie(groep_nr, referentie_button, referentie_button_naam) {
 if(referentie_button=='true') { setTimeout('referentieMenu(\'down\',\'true\')',300); } else { setTimeout('referentieMenu(\'down\')',300); }
 if(referentieLoaded==0) {
  document.getElementById('content').height=parseInt(document.getElementById('content').height)-30;
  document.getElementById('iframe_table').style.height=parseInt(document.getElementById('iframe_table').style.height)-30+'px';
  document.getElementById('footer').style.height='60px';
  document.getElementById('footer_link').style.top=parseInt(document.getElementById('footer_link').style.top)+30+'px';
 }
 document.getElementById('referentie_button').src='images/'+referentie_button_naam+'_menu_button_off.jpg';
 for(var x=1; x<7; x++) {
  if(x==groep_nr) {
   document.getElementById('groep_'+groep_nr).style.display='inline';
  }
  else {
   document.getElementById('groep_'+x).style.display='none';
  }
 }
 referentieLoaded=1;
}
function endReferentie() {
 if(parseInt(document.getElementById('referentie_menu').style.top)<173) {
  referentieMenu('down');
 }
 if(referentieLoaded==1) {
  document.getElementById('content').height=parseInt(document.getElementById('content').height)+30;
  document.getElementById('iframe_table').style.height=parseInt(document.getElementById('iframe_table').style.height)+30+'px';
  document.getElementById('footer').style.height='30px';
  document.getElementById('footer_link').style.top=parseInt(document.getElementById('footer_link').style.top)-30+'px';
  document.getElementById('referentie_button').src='images/referenties_menu_button_off.jpg';
  for(var x=1; x<6; x++) {
   document.getElementById('groep_'+x).style.display='none';
  }
  referentieLoaded=0;
 }
}