function alertSize() {
	myHeight = 0;
	myWidth = 0;
	
	if( typeof( window.innerWidth ) == 'number' ) {
		//Non-IE
		myHeight = window.innerHeight;
		myWidth = window.innerWidth;
		} else {
			if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
				//IE 6+ in 'standards compliant mode'
				myHeight = document.documentElement.clientHeight;
				myWidth = document.documentElement.clientWidth;
			} else {
			if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
				//IE 4 compatible
				myHeight = document.body.clientHeight;
				myWidth = document.body.clientWidth;
			}
		}
	}
	
	contentHoogte=myHeight;
	
	if(contentHoogte<0){
		contentHoogte=0;
	}
	
	if(document.all){
		document.all.columnright.style.height=contentHoogte+'px';
	}
	else{
		document.getElementById("columnright").style.height=contentHoogte+'px';
	}
};

window.onresize = alertSize;


var theImages = new Array()

theImages[0] = '/gfx/visual/visual1.jpg';
theImages[1] = '/gfx/visual/visual2.jpg';
theImages[2] = '/gfx/visual/visual3.jpg';
theImages[3] = '/gfx/visual/visual4.jpg';
theImages[4] = '/gfx/visual/visual5.jpg';
theImages[5] = '/gfx/visual/visual6.jpg';
theImages[6] = '/gfx/visual/visual7.jpg';
theImages[7] = '/gfx/visual/visual8.jpg';
theImages[8] = '/gfx/visual/visual9.jpg';
theImages[9] = '/gfx/visual/visual10.jpg';
theImages[10] = '/gfx/visual/visual11.jpg';
theImages[11] = '/gfx/visual/visual12.jpg';
theImages[12] = '/gfx/visual/visual13.jpg';


var j = 0;
var p = theImages.length;
var preBuffer = new Array();
for (i = 0; i < p; i++)
{
   preBuffer[i] = new Image();
   preBuffer[i].src = theImages[i];
}
var whichImage = Math.round(Math.random()*(p-1));

function showImage()
{
	document.write('<img title="Tyco waterworks benelux" alt="Tyco waterworks benelux" src="'+theImages[whichImage]+'">');
}

function checkform(form, lang)
{
	if (form.naam.value == "")
	{
		switch(lang)
		{
			case 'eng':	alert('You have to fill in your name');
					break;
			case 'deu':	alert('U moet uw naam invullen');
					break;
			default:	alert('U moet uw naam invullen');
		}
		form.naam.focus();
		return false;
	}
	else if (form.voorletter.value == "")
	{
		switch(lang)
		{
			case 'eng':	alert('You have to fill in your surname');
					break;
			case 'deu':	alert('U moet uw voorletters invullen');
					break;
			default:	alert('U moet uw voorletters invullen');
		}
		form.voorletter.focus();
		return false;
	}
	else if (form.bedrijf.value == "")
	{
		switch(lang)
		{
			case 'eng':	alert('You have to fill in your companyname');
					break;
			case 'deu':	alert('U moet uw bedrijfsnaam invullen');
					break;
			default:	alert('U moet uw bedrijfsnaam invullen');
		}
		form.bedrijf.focus();
		return false;
	}
	else if (form.straat.value == "")
	{
		switch(lang)
		{
			case 'eng':	alert('You have to fill in your street');
					break;
			case 'deu':	alert('U moet uw straat invullen');
					break;
			default:	alert('U moet uw straat invullen');
		}
		form.straat.focus();
		return false;
	}
	else if (form.stad.value == "")
	{
		switch(lang)
		{
			case 'eng':	alert('You have to fill in your city');
					break;
			case 'deu':	alert('U moet uw plaatsnaam invullen');
					break;
			default:	alert('U moet uw plaatsnaam invullen');
		}
		form.stad.focus();
		return false;
	}
	else if (form.postcode.value == "")
	{
		switch(lang)
		{
			case 'eng':	alert('You have to fill in your postal code');
					break;
			case 'deu':	alert('U moet uw postcode invullen');
					break;
			default:	alert('U moet uw postcode invullen');
		}
		form.postcode.focus();
		return false;
	}	
	else if (form.telefoon.value == "")
	{
		switch(lang)
		{
			case 'eng':	alert('You have to fill in your telephone number');
					break;
			case 'deu':	alert('U moet uw telefoonnummer invullen');
					break;
			default:	alert('U moet uw telefoonnummer invullen');
		}
		form.telefoon.focus();
		return false;
	}
	else if (form.email.value == "")
	{
		switch(lang)
		{
			case 'eng':	alert('You have to fill in your emailaddress');
					break;
			case 'deu':	alert('U moet uw email invullen');
					break;
			default:	alert('U moet uw email invullen');
		}
		form.email.focus();
		return false;
	}
	else
	{
		return true;
	}
}