<!--
//Made by Vijay Bhagwandas, Lenntech BV
var t, p //tap-water,cost

function rainNL(){
	var l = document.forms[0].l.value //length
	var w = document.forms[0].w.value //width
	var A = document.forms[0].A.value //surface
	var e = document.forms[0].e.value //cost per liter
	
	if(A == "" && l != "" && w == ""){
		alert("vul de breedte in")
		clearForm()
		return
	}
	
	if(A == "" && w != "" && l == ""){
		alert("vul de lengte in")
		clearForm()
		return
	}
	
	if(A != "" && l != "" && w == ""){
		alert("is de oppervlakte " +A+ " m2 of hoe zit dat nou!")
		clearForm()
		return
	}
	
	if(A != "" && w != "" && l == ""){
		alert("is de oppervlakte " +A+ " m2 of hoe zit dat nou!!")
		clearForm()
		return
	}	
	
	if(A != "" && w != "" && l != ""){
		alert("Wat wil je!\r\rGeef de oppervlakte, weet je die niet:\r\rGeef de lengte en breedte!!")
		clearForm()
		return
	}	
	
	if(A == "" && w == "" && l == ""){
		alert("Je zult de oppervlakte of lengte en breedte in moeten vullen!\rAnders kan er niks berekend worden.")
		return
	}
		
	if(e == ""){
		alert("Wat denk je!!")
		alert("Dat leidingwater gratis is")
		alert("Vul de kosten van een m3 water in!")
		return
	}
		
	if(l == "" && w == ""){
		document.forms[0].t.value = Math.round(document.forms[0].A.value*document.forms[0].a.value*1e-3)
		t = document.forms[0].t.value
	}
	else{
		A = l*w
		document.forms[0].t.value = Math.round(A*document.forms[0].a.value*1e-3)
		t = document.forms[0].t.value
	}
	
	document.forms[0].p.value = (document.forms[0].t.value*document.forms[0].e.value).toFixed(2)
	p = document.forms[0].p.value
	if(e != 0)
		setTimeout("alert(\"Je kunt \" +t+\" m3 water en €\" +p+ \" per jaar besparen!\")", 2000)
	else
		alert("Leidingwater is bij jou zeker gratis,\rje bespaart niks, alleen het milieu")

}

function clearForm(){
	var form = window.document.forms[0]
	for(var i = 0; i < form.elements.length; i++){
		if(i == 3){
			continue
		}
		if(form.elements[i].type == "text"){
			form.elements[i].value = ""
		}
	}
}
function al(){
	alert("Yep,\rhet regent meer in engeland dan in Europa!")
}

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
		rainNL(); 
	}

	if( Key == 27){ //27 is ascii value for escape key
		clearForm(); 
	}
}
//-->