function colseq(){





 document.getElementById('movie-box').style.height = 'auto';

 document.getElementById('content-box').style.height = 'auto';

 document.getElementById('nieuws-box').style.height = 'auto';   



 var x1 = document.getElementById('movie-box').offsetHeight; 

 var x2 = document.getElementById('content-box').offsetHeight;

 var x3 = document.getElementById('nieuws-box').offsetHeight; 

 

 var hoogte = 0;

 if (x2 > x1){

  hoogte = x2;

 }

 else{

  hoogte = x1;

 }

 

 if (hoogte < x3){

   hoogte = x3;

 }

 document.getElementById('movie-box').style.height = hoogte + "px";

 document.getElementById('content-box').style.height = hoogte + "px";

 document.getElementById('nieuws-box').style.height = hoogte + "px";  



}



function MM_findObj(n, d) { //v4.01

  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {

    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}

  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];

  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);

  if(!x && d.getElementById) x=d.getElementById(n); return x;

}



function MM_validateForm() { //v4.0

  var i,p,q,nm,test,num,min,max,errors='',args=MM_validateForm.arguments;

  for (i=0; i<(args.length-2); i+=3) { test=args[i+2]; val=MM_findObj(args[i]);

    if (val) { nm=val.name; if ((val=val.value)!="") {

      if (test.indexOf('isEmail')!=-1) { p=val.indexOf('@');

        if (p<1 || p==(val.length-1)) errors+='- '+nm+' is geen geldig e-mail adres.\n';

      } else if (test!='R') { num = parseFloat(val);

        if (isNaN(val)) errors+='- '+nm+' moet een getal zijn.\n';

        if (test.indexOf('inRange') != -1) { p=test.indexOf(':');

          min=test.substring(8,p); max=test.substring(p+1);

          if (num<min || max<num) errors+='- '+nm+' must contain a number between '+min+' and '+max+'.\n';

    } } } else if (test.charAt(0) == 'R') errors += '- '+nm+' \n'; }

  } if (errors) alert('De volgende velden zijn nog niet (correct) ingevuld:\n'+errors);

  document.MM_returnValue = (errors == '');

}