// JavaScript Document

function showtr(id)
{
	if(document.getElementById(id).style.display == 'none' && document.getElementById(id).style.visibility == 'hidden')
	{
		document.getElementById(id).style.display = '';
		document.getElementById(id).style.visibility = '';
	} 
	else 
	{
		document.getElementById(id).style.display = 'none';
		document.getElementById(id).style.visibility = 'hidden'
	}
}

/* Sorteer nummers */
function sortNumber(a,b)
{
	return a - b;
}

/* DIV height */
function DIVColumns()
{
	
	colLength = new Array(3);
	colLength[0] = document.getElementById("kaderCenterDIV").offsetHeight;
	colLength[1] = document.getElementById("kaderRechtsDIV").offsetHeight;
	colLength[2] = document.getElementById("kaderLinksDIV").offsetHeight;
	colLength[3] = document.getElementById("kaderDIV").offsetHeight;
	
	colLength.sort(sortNumber);
	colLength.reverse();
	
	return colLength[0];
	
}

/* DIV height */
function DIVColumn()
{
	
	colLength = new Array(1);
	colLength[0] = document.getElementById("kaderGrootDIV").offsetHeight;
	colLength[1] = document.getElementById("kaderDIV").offsetHeight;
	
	colLength.sort(sortNumber);
	colLength.reverse();
	
	return colLength[0];
	
}

function DIVheight()
{
	
	if( document.getElementById("kaderLinksDIV") != null && document.getElementById("kaderRechtsDIV") != null )
	{
		
		/* Waarde ophalen */
		divLen = DIVColumns();

		/* Nieuwe hoogte toewijzen */
		document.getElementById("kaderCenterDIV").style.height = divLen+"px";
		document.getElementById("kaderRechtsDIV").style.height = divLen+"px";
		document.getElementById("kaderLinksDIV").style.height = divLen+"px";
		document.getElementById("kaderDIV").style.height = divLen+6+"px";
		
	}
	else if( document.getElementById("kaderGrootDIV") != null )
	{
		
		/* Waarde ophalen */
		divLen = DIVColumn();

		/* Nieuwe hoogte toewijzen */
		document.getElementById("kaderGrootDIV").style.height = divLen+"px";
		document.getElementById("kaderDIV").style.height = divLen+11+"px";
		
	}
	
}

// execute function when page loads 
window.onload = function()
{ 
	if(document.getElementsByTagName){ 

		DIVheight(); 

	}
}