function validateinstallation()
{
	if(document.getElementById('inputInstnr').value.length < 2)
	{
		alert('Installationsnummer skal udfyldes');
		document.getElementById('inputInstnr').focus();
		return false;
	}
	
	return true;
}


function validateaddress()
{
	if(document.getElementById('inputName').value.length < 2)
	{
		alert('Navn skal udfyldes');
		document.getElementById('inputName').focus();
		return false;
	}
	else if(document.getElementById('inputAddress').value.length < 2)
	{
		alert('Adresse skal udfyldes');
		document.getElementById('inputAddress').focus();
		return false;
	}
	else if(document.getElementById('inputZip').value.length < 2)
	{
		alert('Postnummer sskal udfyldes');
		document.getElementById('inputZip').focus();
		return false;
	}
	else if(document.getElementById('inputCity').value.length < 2)
	{
		alert('By skal udfyldes');
		document.getElementById('inputCity').focus();
		return false;
	}
	else if(document.getElementById('inputEmail').value.length > 2)
	{
		/* Only validate email if it's there... */
		return EmailCheck(document.getElementById('inputEmail').value);
	}
	
	return true;
}

function EmailCheck (emailStr) {
	if(emailStr=="") {
		alert("Email-addressen skal udfyldes.")
		return false
	}

	var emailPat=/^(.+)@(.+)$/
	var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
	var validChars="\[^\\s" + specialChars + "\]"
	var quotedUser="(\"[^\"]*\")"
	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
	var atom=validChars + '+'
	var word="(" + atom + "|" + quotedUser + ")"
	var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")

	/* Begin with the coarse pattern to simply break up user@domain into
	   different pieces that are easy to analyze. */
	var matchArray=emailStr.match(emailPat)
	if (matchArray==null) {
	  /* Too many/few @'s or something; basically, this address doesn't
	     even fit the general mould of a valid e-mail address. */
		alert("Email-addressen er ikke gyldig (tjek @ og .'er)")
		return false
	}
	var user=matchArray[1]
	var domain=matchArray[2]

	// See if "user" is valid
	if (user.match(userPat)==null) {
	    // user is not valid
	    alert("Brugernavnet er ikke gyldigt (brugernavnet står foran @'et i email-adressen).")
	    return false
	}

	/* if the e-mail address is at an IP address (as opposed to a symbolic
	   host name) make sure the IP address is valid. */
	var IPArray=domain.match(ipDomainPat)
	if (IPArray!=null) {
	    // this is an IP address
		  for (var i=1;i<=4;i++) {
		    if (IPArray[i]>255) {
		        alert("Destinations IP-addressen er ikke gyldig!")
			return false
		    }
	    }
	    return true
	}

	// Domain is symbolic name
	var domainArray=domain.match(domainPat)
	if (domainArray==null) {
		alert("Domæne-navnet er ikke gyldigt (domæne-navnet står efter @'et og før det sidste punktum i email-adressen).")
	    return false
	}

	/* domain name seems valid, but now make sure that it ends in a
	   three-letter word (like com, edu, gov) or a two-letter word,
	   representing country (uk, nl), and that there's a hostname preceding
	   the domain or country. */

	/* Now we need to break up the domain to get a count of how many atoms
	   it consists of. */
	var atomPat=new RegExp(atom,"g")
	var domArr=domain.match(atomPat)
	var len=domArr.length
	if (domArr[domArr.length-1].length<2 ||
	    domArr[domArr.length-1].length>3) {
	   // the address must end in a two letter or three letter word.
	   alert("Email-adressen skal ende med et tre-bogstavs domæne (f.eks. com), eller en to-bogstavs landekode (f.eks. dk).")
	   return false
	}

	// Make sure there's a host name preceding the domain.
	if (len<2) {
	   var errStr="Der skal angives et domæne-navn i email-adressen!"
	   alert(errStr)
	   return false
	}

	// If we've gotten this far, everything's valid!
	return true;
}