<!-- hide script from old browsers
function bereken()
{
//------------------------------------------------------------
// Script by Jasper Elgersma; 
// Made for Lenntech Water- & Luchtbehandeling Holding B.V.
// www.lenntech.com       info@lenntech.com
// 19 september 2002
// Copyright Jasper Elgersma & Lenntech
//------------------------------------------------------------

var a=1;
var b=1e-3;
var c=1e-6;
var d=1e-3;
var e=1e-4;
var f=1;
var g=100;
var h=1.563e-6;

var temp

var input=document.omreken.input.value;
var extentie=document.omreken.type.value;

if (extentie=="a"){temp=input*a}
else if (extentie=="b"){temp=input*b}
else if (extentie=="c"){temp=input*c}
else if (extentie=="d"){temp=input*d}
else if (extentie=="e"){temp=input*e}
else if (extentie=="f"){temp=input*f}
else if (extentie=="g"){temp=input*g}
else if (extentie=="h"){temp=input*h}

document.omreken.a.value=(temp/a).toPrecision(3);
document.omreken.b.value=(temp/b).toPrecision(3);
document.omreken.c.value=(temp/c).toPrecision(3);
document.omreken.d.value=(temp/d).toPrecision(3);
document.omreken.e.value=(temp/e).toPrecision(3);
document.omreken.f.value=(temp/f).toPrecision(3);
document.omreken.g.value=(temp/g).toPrecision(3);
document.omreken.h.value=(temp/h).toPrecision(3);
}

//met entertoets laten berekenen!
document.onkeypress = keyhandler;
function keyhandler(e) 
{
	Key = (document.layers)?e.which:window.event.keyCode;
	if( Key == 13 || Key == 32 )
	{ //13 is ascii value for Enter key 32 is space
		bereken(); 
	}
}

// end hiding script from old browsers -->