//Check for valid email
function emailCheck (emailStr) {
	if (!emailStr){
		alert("Field is blank.");
		return false;
	}
	/* The following pattern is used to check if the entered e-mail address fits the user@domain format.  
	It also is used to separate the username from the domain. */
	var emailPat=/^(.+)@(.+)$/
	/* The following string represents the pattern for matching all special characters.  
	We don't want to allow special characters in the address. These characters include ( ) < > @ , ; : \ " . [ ]    */
	var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
	/* The following string represents the range of characters allowed in a username or domainname.  
	It really states which chars aren't allowed. */
	var validChars="\[^\\s" + specialChars + "\]"
	/* The following pattern applies if the "user" is a quoted string (in which case, there are no rules 
	about which characters are allowed and which aren't; anything goes).  E.g. "jiminy cricket"@disney.com
   is a legal e-mail address. */
	var quotedUser="(\"[^\"]*\")"
	/* The following pattern applies for domains that are IP addresses, rather than symbolic names.  
	E.g. joe@[123.124.233.4] is a legal e-mail address. NOTE: The square brackets are required. */
	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
	/* The following string represents an atom (basically a series of non-special characters.) */
	var atom=validChars + '+'
	/* The following string represents one word in the typical username. For example, in 
	john.doe@somewhere.com, john and doe are words.  Basically, a word is either an atom or quoted string. */
	var word="(" + atom + "|" + quotedUser + ")"
	// The following pattern describes the structure of the user
	var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
	/* The following pattern describes the structure of a normal symbolic domain, as opposed to ipDomainPat, shown above. */
	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")

	/* Finally, let's start trying to figure out if the supplied address is
	valid. */

	/* 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. */
		var msg="Email address seems incorrect (check @ and .'s)";
		return msg;
	}
	var user=matchArray[1]
	var domain=matchArray[2]

	// See if "user" is valid 
	if (user.match(userPat)==null) {
		// user is not valid
		alert("The username doesn't seem to be valid.")
		document.mailForm.custEmail.focus()
		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("Destination IP address is invalid!")
				document.mailForm.custEmail.focus()
				return false
		    }
	    }
		return true
	}

	// Domain is symbolic name
	var domainArray=domain.match(domainPat)
	if (domainArray==null) {
		alert("The domain name doesn't seem to be valid.")
		document.mailForm.custEmail.focus()
		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("The address must end in a three-letter domain, or two letter country.")
		document.postcard.custEmail.focus()
		return false
	}

	// Make sure there's a host name preceding the domain.
	if (len<2) {
		var errStr="This address is missing a hostname!"
		alert(errStr)
		document.postcard.custEmail.focus()
		return false
	}
	/*if (document.postcard.specialCode.value!=""){
		if (!document.postcard.discountType[0].checked){
			if (!document.postcard.discountType[1].checked){
				alert("Please check which type of discount");
				return false;
			}
		}
	}*/
	// If we've gotten this far, everything's valid!
	return true;

}
//email address
function checkTheEmail(eValue){
	msg=emailCheck(eValue);
	if (msg!=true){
		document.getElementById("email").style.color="#ff0000";
		document.forms['postcard'].email.focus();
		//alert(msg);
		return msg;
	}
}
function stringCheck(str){
	//remove whitespace
	str=str.replace(/^\s*(.*?)\s*$/, "$1"); 
	var matchArray=str.match(/[^0-9a-zA-Z -?!<>,@\n']/g);	
	if (matchArray!=null) {
		var m="Invalid characters used";
		return m;
	}
}
//Validate form entries
function checkFields(){
	for (var a=0; a<document.forms.length; a++){
		for (var b=0; b<document.forms[a].elements.length; b++){
			var idName=document.forms[a].elements[b].name;
			if (document.forms[a].elements[b].type=="text" || document.forms[a].elements[b].type=="textarea"){			
				var idName=document.forms[a].elements[b].name;
				if(document.forms[a].elements[b].name!="resRoom"){
					if(document.forms[a].elements[b].value==''){
						document.getElementById(idName).style.color="#ff0000";
						document.forms[a].elements[b].focus();
						alert("Missing Information");
						return false;
					}
					else{
						if(document.forms[a].elements[b].name=="sendEmail"){
							var msg=emailCheck(document.forms[a].elements[b].value);
							//alert(msg);
							if (msg!=true){
								alert (msg);
								document.getElementById(idName).style.color="#ff0000";
								document.forms[a].elements[b].focus();
								return false;
							}
						}
						if(document.forms[a].elements[b].name=="toEmail"){
							var msg=emailCheck(document.forms[a].elements[b].value);
							//alert(msg);
							if (msg!=true){
								alert (msg);
								document.getElementById(idName).style.color="#ff0000";
								document.forms[a].elements[b].focus();
								return false;
							}
						}
						if(document.forms[a].elements[b].name=="message"){
							var mess=document.forms[a].elements[b].value;
							//what is the character count?  >512 alert and return false
							if(mess.length>512){
								alert("Message exceeds the 512 character limit.  Please reduce the size");
								document.getElementById(idName).style.color="#ff0000";
								document.forms[a].elements[b].focus();
								return false;
							}
						}
						document.getElementById(idName).style.color="#000000";							
					}
				}
			}
			else if (document.forms[a].elements[b].type=="select-one"){
				if(document.forms[a].elements[b].value=='Select an occasion'){
					document.getElementById(idName).style.color="#ff0000";
					document.forms[a].elements[b].focus();
					alert("Missing Information");
					return false;
				}
			}
			else if (document.forms[a].elements[b].type=="radio"){
				var err=0;
				if(document.forms[a].elements[b].checked==true){
					err=1;
					return true;
				}
				
			}
		}				
	}
	if (err==0){
		alert("Please select a template");
		return false;
	}
	return false;
}
function printNumRem(str){
	var strlen=str.length;
	var max=400;
	var temp=max-strlen;
	if(strlen<=max){
		document.getElementById('remChar').innerHTML="Number of characters remaining:  "+temp;
	}
	else {
		alert ("Maximum number of characters has been reached.");
		document.forms['greetingCard'].message.value=str.substring(0,(str.length-1));
	}
}
function printThis(){
	document.getElementById('no_print').style.visibility="hidden";
	window.print();
	window.close();
}