// --- Form Validation ---
function message(obj,msg)
	{alert(msg);obj.focus();mt=false}
	
function checker(obj,msg)
	{if(obj.value=="" && mt==true)message(obj,msg)}
	
function radio(obj,msg)
	{
	y=0;for(i=0;i<obj.length;i++){if(obj[i].checked)y=1}
	if(y==0 && mt==true)message(obj[0],msg)
	}
	
function check_child(fm,num)
	{
	if(eval("fm.child"+num).value!="")
		{
		radio(eval("fm.gender"+num),"You must enter the child's gender")
		checker(eval("fm.dob"+num),"You must enter the child's date of birth")
		radio(eval("fm.place"+num),"You must enter the type of place required")
		checker(eval("fm.start"+num),"You must enter the child's proposed start date")
		}
	}
	
function email(obj)
	{
	var emailStr=obj.value;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 +")*$");var matchArray=emailStr.match(emailPat)
	if ((matchArray==null) && mt==true){message(obj,"Email address seems incorrect (check @ and .'s)")}
	if (mt==true){var user=matchArray [1];var domain=matchArray [2];if (user.match(userPat)==null)message(obj,"The username doesn't seem to be valid.")}
	if (mt==true){var IPArray=domain.match(ipDomainPat);if (IPArray!=null){for (var j=1;j<=4;j++){if (IPArray[j]>255)message(obj,"Destination IP address is invalid!")}}}
	if (mt==true){var domainArray=domain.match(domainPat);if (domainArray==null)message(obj,"The domain name doesn't seem to be valid.")}
	if (mt==true){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>4)message(obj,"The address must end in a two,three or four letter domain")}
	if ((len<2) && mt==true)message(obj,"This address is missing a hostname!");
	}
	
function contact(fm)
	{
	mt=true;
	checker(fm.fname,'You must enter your name')
	checker(fm.sname,'You must enter your name')
	checker(fm.address1,'You must enter the first line of your address')
	checker(fm.address1,'You must enter the second line of your address')
	checker(fm.postcode,'You must enter your post code')
	email(fm.sender_email)
	checker(fm.tel,'You must enter a telephone number')
	check_child(fm,1)
	check_child(fm,2)
	checker(fm.captcha,'Please verify the letters displayed on the screen')
	return mt
	}