function validateGuestFeedback(commentform)
{
	if (commentform.author.value=='NAME'){
		alert("Please enter your Name");
		commentform.author.focus();
		return false;
	}
	
	if (commentform.email.value=='E-MAIL ADDRESS'){
		alert("Please enter your Email Address");
		commentform.email.focus();
		return false;
	}
	
	if (!emailCheck(commentform.email.value)){
		commentform.email.value = 'E-MAIL ADDRESS';
		commentform.email.focus();
		return false;
	}
	
	if (commentform.contact_number.value=='CONTACT NUMBER'){
		alert("Please enter your Contact Number");
		commentform.contact_number.focus();
		return false;
	}
	
	if (!isNumeric(commentform.contact_number.value)){
		commentform.contact_number.value = 'CONTACT NUMBER';
		commentform.contact_number.focus();
		return false;
	}
	
	if (commentform.subject.value=='SUBJECT'){
		alert("Please enter a Subject");
		commentform.subject.focus();
		return false;
	}
	
	if (commentform.comment.value=='FEEDBACK'){
		alert("Please enter some Feedback");
		commentform.comment.focus();
		return false;
	}
	
	if (commentform.comment_image.value==''){
		alert("Please upload image");
		
		return false;
	}
	
}

function validateSignup(signupForm) {
	
	if (signupForm.Email.value=='Email'){
		alert("Please enter your Email Address");
		signupForm.Email.focus();
		return false;
	}
	
	if (!emailCheck(signupForm.Email.value)){
		signupForm.Email.value = 'Email';
		signupForm.Email.focus();
		return false;
	}
}

function isNumeric(str)
{
var pattern = "0123456789+-)( ";
var i = 0;
	do
	{
		var pos = 0;
		for (var j=0;j<pattern.length;j++)
			if (str.charAt(i)==pattern.charAt(j))
				pos = 1;
		i++;
	}
	while (pos==1 && i<str.length)
	if (pos==0)
		return false;
	return true;
}

jQuery.fn.checkName = function() {

	if($(this).val() != "NAME")
	{
	
	 return true;
	}
else{
	alert("Please enter Name");
	$(this).focus();
	return false;
}
};


jQuery.fn.checkEmail =  function emailCheck () 
{
var emailStr = $(this).val();
var emailPat=/^(.+)@(.+)$/
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) 
	{
	alert("Please enter a valid email address (check @ and .'s)");
	$(this).focus();
	return false
	}
var user=matchArray[1]
var domain=matchArray[2]
	if (user.match(userPat)==null) 
	{
	// user is not valid
	alert("The username doesn't seem to be valid.");
	$(this).focus();
	return false
	}
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!");
		$(this).focus();
		return false
		}
	}
	return true
}
var domainArray=domain.match(domainPat)
	if (domainArray==null) 
	{
	alert("The domain name doesn't seem to be valid.");
	$(this).focus();
	return false
	}
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) 
	{
	alert("The address must end in a three-letter domain, or two letter country.");
	$(this).focus();
	return false
	}
	if (len<2) 
	{
	var errStr="This address is missing a hostname!"
	alert(errStr);
	$(this).focus();
	return false
	}
	return true;
};


function emailCheck (emailStr)
{
	
	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) 
		{
		alert("Please enter a valid email address (check @ and .'s)");
		$(this).focus();
		return false
		}
	var user=matchArray[1]
	var domain=matchArray[2]
		if (user.match(userPat)==null) 
		{
		// user is not valid
		alert("The username doesn't seem to be valid.");
		$(this).focus();
		return false
		}
	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!");
			$(this).focus();
			return false
			}
		}
		return true
	}
	var domainArray=domain.match(domainPat)
		if (domainArray==null) 
		{
		alert("The domain name doesn't seem to be valid.");
		$(this).focus();
		return false
		}
	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) 
		{
		alert("The address must end in a three-letter domain, or two letter country.");
		$(this).focus();
		return false
		}
		if (len<2) 
		{
		var errStr="This address is missing a hostname!"
		alert(errStr);
		$(this).focus();
		return false
		}
		return true;
	}