var pos;
var timerid;
var op;
pos=0;

function reposition()
{parent.prevnav=0;
 nav(parent.navvalue);
}

function preloads()
{//preload polaroids
 pol_preview=new Array(7);
 for(i=1;i<=3;i++) {pol_preview[i]=new Image()}
 pol_preview[1].src="images/polautonoom.jpg";
 pol_preview[2].src="images/polportret.jpg";
 pol_preview[3].src="images/poltoegepast.jpg";
 //preload rollovers
 but=new Array(14);
 for(i=1;i<=6;i++) {but[i]=new Image()}
 but[1].src="images/autonoom.gif";
 but[2].src="images/autonoom_h.gif";
 but[3].src="images/portret.gif";
 but[4].src="images/portret_h.gif";
 but[5].src="images/toegepast.gif";
 but[6].src="images/toegepast_h.gif";
 //preload arrows
 arrow1=new Image();
 arrow1='images/up_h.gif';
 arrow2=new Image();
 arrow2='images/down_h.gif';
}

function polarise(s,op)
{if (op==0) {clearTimeout(timerid)};
 o=document.getElementById('pola').style;
 o.visibility='visible';
 o.opacity=op;                              //CSS3
 o.filter='alpha(opacity='+(op*100)+')';    //ie
 o.KhtmlOpacity=op;                         //safari
 op+=1/s;
 if (op<=1) {timerid=setTimeout('polarise('+s+','+op+')',100);}
 else {document.getElementById("achtergrond").style.visibility="visible";}
}

function swap(butid,n,m)
{document.images[butid].src=but[n].src;
 if (m!=0) {
  document.getElementById('achtergrond').src=document.getElementById('pola').src;
  document.getElementById('pola').src=pol_preview[m].src;
  polarise(10,0)};
}

function showtext()
{if (document.getElementById('text')) {document.getElementById('text').style.visibility='visible';}}

function hidetext()
{if (document.getElementById('text')) {document.getElementById('text').style.visibility='hidden';}}




var slideheight=0;
var slidingdown=false;

function showslides()
{if ((slideheight<90) && !(slidingdown))
 {slideheight+=3;
  doc1=document.getElementById('motioncontainer');
//  doc2=document.getElementById('motiongallery');
  doc1.style.height=slideheight+"px";
//  doc2.style.height=slideheight+"px";
  doc1.style.top=-slideheight+"px";
  timerid=setTimeout('showslides()',20);
 } 
}

function hideslides(i)
{if (slideheight>0)
 {slidingdown=true;
  if (i==0) {slideheight=0; slidingdown=false;} else {slideheight-=3;};
  doc1=document.getElementById('motioncontainer');
//  doc2=document.getElementById('motiongallery');
  doc1.style.height=slideheight+"px";
  doc1.style.top=-slideheight+"px";
  timerid=setTimeout('hideslides()',20);
 }
 else {slidingdown=false;} 
}

var navbarheight=0;
var navbardown=false;

function movethumbup(i)
{if (i>1)
 {doc1=document.getElementById('thumbline'+(i-1));
  doc2=document.getElementById('thumbline'+i);
  //swap image
  temp=doc1.childNodes[0].childNodes[0].src;
  doc1.childNodes[0].childNodes[0].src=doc2.childNodes[0].childNodes[0].src;
  doc2.childNodes[0].childNodes[0].src=temp;
  //swap filename
  temp=doc1.childNodes[2].childNodes[0].nodeValue;
  doc1.childNodes[2].childNodes[0].nodeValue=doc2.childNodes[2].childNodes[0].nodeValue;
  doc2.childNodes[2].childNodes[0].nodeValue=temp;
  //swap text
  temp=doc1.childNodes[3].childNodes[0].childNodes[0].nodeValue;
  doc1.childNodes[3].childNodes[0].childNodes[0].nodeValue=doc2.childNodes[3].childNodes[0].childNodes[0].nodeValue;
  doc2.childNodes[3].childNodes[0].childNodes[0].nodeValue=temp;
 } 
}

function movethumbdown(i)
{
 {doc1=document.getElementById('thumbline'+i);
  doc2=document.getElementById('thumbline'+(i+1));
  //swap image
  temp=doc1.childNodes[0].childNodes[0].src;
  doc1.childNodes[0].childNodes[0].src=doc2.childNodes[0].childNodes[0].src;
  doc2.childNodes[0].childNodes[0].src=temp;
  //swap filename
  temp=doc1.childNodes[2].childNodes[0].nodeValue;
  doc1.childNodes[2].childNodes[0].nodeValue=doc2.childNodes[2].childNodes[0].nodeValue;
  doc2.childNodes[2].childNodes[0].nodeValue=temp;
  //swap text
  temp=doc1.childNodes[3].childNodes[0].childNodes[0].nodeValue;
  doc1.childNodes[3].childNodes[0].childNodes[0].nodeValue=doc2.childNodes[3].childNodes[0].childNodes[0].nodeValue;
  doc2.childNodes[3].childNodes[0].childNodes[0].nodeValue=temp;
 } 
}
var editing=false;

function edittext(i)
{if (!editing)
 {editing=true;
  doc1=document.getElementById('thumbline'+i);
  // create form
  f=document.createElement('form');
  f.setAttribute('id','textform');
  f.setAttribute('action','javascript:storetext()');
  // create text field
  textinput=document.createElement('input');
  textinput.setAttribute('type','text');
  textinput.setAttribute('id','textinput');
  textinput.setAttribute('value',doc1.childNodes[3].childNodes[0].childNodes[0].nodeValue);
  f.appendChild(textinput);
  doc1.childNodes[3].appendChild(f);
 // doc1.childNodes[3].childNodes[0].childNodes[0].nodeValue='hallo';
 }
}

function storetext()
{doc1=document.getElementById('textinput');
 doc1.parentNode.parentNode.childNodes[0].childNodes[0].nodeValue=doc1.value;
 doc2=document.getElementById('textform');
 doc1.parentNode.parentNode.removeChild(doc2);
 editing=false; 
}


function nothing(){}