<!-- hide script from old browsers
//Made by Vijay Bhagwandas, Lenntech BV
function convertor2()
{
	var a = document.converse.a2.value// viekante milimeter 
	var b = document.converse.b2.value// vierkante centimeter
	var c = document.converse.c2.value// viekante meter
	var d = document.converse.d2.value// are
	var e = document.converse.e2.value// hectare
	var f = document.converse.f2.value// viekante kilometer
	var g = document.converse.g2.value// vierkante inch
	var h = document.converse.h2.value// vierkante feet
	var i = document.converse.i2.value// vierkante yard
	var j = document.converse.j2.value// acre
	var k = document.converse.k2.value// viekante mile
	var value1 = document.converse.D
	var D = value1.options[value1.selectedIndex].value
	var temp
		
	if(a != ""){temp = document.converse.a2.value*1e-6;}
	if(b != ""){temp = document.converse.b2.value*1e-4;}
	if(c != ""){temp = document.converse.c2.value*1;}
	if(d != ""){temp = document.converse.d2.value*1e2;}
	if(e != ""){temp = document.converse.e2.value*1e4;}
	if(f != ""){temp = document.converse.f2.value*1e6;}
	if(g != ""){temp = document.converse.g2.value*0.00064516;}
	if(h != ""){temp = document.converse.h2.value*0.09290304;}
	if(i != ""){temp = document.converse.i2.value*0.8361274;}
	if(j != ""){temp = document.converse.j2.value*4046.825;}
	if(k != ""){temp = document.converse.k2.value*2589988;}

	document.converse.a2.value = (temp/1e-6).toPrecision(D)
	document.converse.b2.value = (temp/1e-4).toPrecision(D)
	document.converse.c2.value = (temp/1).toPrecision(D)
	document.converse.d2.value = (temp/1e2).toPrecision(D)
	document.converse.e2.value = (temp/1e4).toPrecision(D)
	document.converse.f2.value = (temp/1e6).toPrecision(D)
	document.converse.g2.value = (temp/0.00064516).toPrecision(D)
	document.converse.h2.value = (temp/0.09290304).toPrecision(D)
	document.converse.i2.value = (temp/0.8361274).toPrecision(D)
	document.converse.j2.value = (temp/4046.825).toPrecision(D)
	document.converse.k2.value = (temp/2589988).toPrecision(D)
	

if(a == "" || b == "" || c == "" || d == "" || e == "" || f == "" || g == "" || h == "" || i == "" || j == "" || k == "")
		return;
}

function cirkel()
{
	var r = document.cirkell.r2.value
	var A = document.cirkell.A2.value
	var value1 = document.converse.D
	var D = value1.options[value1.selectedIndex].value
	
	if(r != "")
	{
		document.cirkell.r2.value = r*1 
		document.cirkell.A2.value = (Math.PI*Math.pow(r,2)).toPrecision(D)
	}
	if(A != "")
	{
		document.cirkell.r2.value = Math.pow((A/Math.PI),0.5).toPrecision(D)
		document.cirkell.A2.value = A*1
	}
}

function change()
{
	convertor2()
	cirkel()
}

//met enter op de toetsenbord 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
		convertor2();
		cirkel();
	}

	//met escape de velden schoonmaken
	if( Key == 27 || Key == 8 ){ //27 is ascii value for Escape key 8 is backspace
		clearConverse();
		document.cirkell.r2.value = "";
		document.cirkell.A2.value = "";
	}
}
// end hidiing script from old browsers -->