function equalizeColumns()
{
    var columns     = $$('.equalize');
    var max_height  = 0;

    columns.each(function(item)
    {
        max_height = Math.max(max_height, item.getSize().y);
    });

    columns.setStyle('height', max_height);
}
function zoekActie(oForm, cZoek)
{
	cAction = 'http://www.tubanters.nl/index/zoek/' + cZoek + '/';
	document.forms[oForm.name].action = cAction;
}
function changeMenuPics (objThis, pcAction) {
	objThis.src=(objThis.src.split('_')[0]+'_'+objThis.src.split('_')[1]+'_'+pcAction+'.gif');
}
function switchExtraInfo() {

	if (document.getElementById('extrainfo').style.display=='block') { setItTo='none'; } else { setItTo='block'; }
	document.getElementById('extrainfo').style.display=setItTo;

	return true;
}
function switchAuteurInfo() {

	if (document.getElementById('auteurinfo').style.display=='block') { setItTo='none'; } else { setItTo='block'; }
	document.getElementById('auteurinfo').style.display=setItTo;

	return true;
}
function toolTip (pc_text) {
	//alert(document.getElementById("helptext")!=null);
	if (document.getElementById("helptext")!=null) {
		document.getElementById("helptext").value=pc_text;
		window.status=pc_text;
	}
	return true;
}
function popBackoffice (pc_file) {

	var url    = '/backoffice/' + pc_file;
	var datum  = new Date();
	var tijd   = datum.getTime();

	var scherm = 'id' + tijd;

	window.open(url, scherm,'toolbar=0,scrollbars=1,location=0,statusbar=0,menubar=0,resizable=1,width=620,height=500,left=212,top=84');
}
function popKlein (pc_URL) {

	url    = pc_URL;
	scherm = 'id';

	window.open(url, scherm,'toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,width=620,height=500,left = 212,top = 84');
}
function showLayer (pc_layer)
{
    if ((navigator.appName)=="Netscape")
    {
        c='class';
    }
    else
    {
        c='className';
    }

    var tel=0;

    while (document.getElementById("layer[" + tel + "]")!=null)
    {
        if (tel==pc_layer)
        {
            document.getElementById("td[" + tel + "]").setAttribute(c,"actief");
            document.getElementById("layer[" + tel + "]").style.display="";
        }
        else
        {
            document.getElementById("td[" + tel + "]").setAttribute(c,"inactief");
            document.getElementById("layer[" + tel + "]").style.display='none';
        }
        tel=tel+1;
    }

}
function confirmDelete(pc_URL) {


	if (pc_URL.substring(0,1)!='/' )
	{
		pc_URL = '/' + pc_URL;
	}

	antwoord = confirm('Wilt u dit gegeven verwijderen?');

	if (antwoord) {
		popKlein(pc_URL);
			message ('Item verwijderd!');
	}
	else { return true; }
}
function confirmHide(pc_URL) {

	antwoord = confirm('Wilt u dit gegeven verbergen?');

	if (antwoord) {
		popKlein(pc_URL);
			message ('Item verborgen!');
	}
	else { return true; }
}