function Email_Check(emailStr) 
{
	/* 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. */
		//alert("Email address seems incorrect (check @ and .'s)")
		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("Invalid email address")
		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("Invalid email address")
				return false
			}
		}
		return true
	}

	// Domain is symbolic name
	var domainArray=domain.match(domainPat)
	if (domainArray==null)
	{
		//alert("Invalid email address")
		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("Invalid email address")
		return false
	}

	// Make sure there's a host name preceding the domain.
	if (len<2) 
	{
		var errStr="Invalid email address"
		alert(errStr)
		return false
	}

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

function IsNumeric(strCharacter)
 {
   	for (k=0;k<strCharacter.length;k++)
			{
				c = strCharacter.charAt(k);
				if (!(c>='0' && c<='9'))
					return false;
			}
			return true;
}

function ValidateAddCountry()
{
	if( document.getElementById("txtCountry").value == 0)
	{
		alert("Please enter country");
		document.getElementById("txtCountry").focus();
		return false;
	}
	else
		return true;
}
function ValidateAddCategory()
{
	if( document.getElementById("txtCategory").value == 0)
	{
		alert("Please enter category");
		document.getElementById("txtCategory").focus();
		return false;
	}
	else
		return true;
}
function ValidateSubCategory()
{
	if(document.getElementById("ddlCategory").selectedIndex == 0)
	{
		alert("Please select the category");
		document.getElementById("ddlCategory").focus();
		return false;
	}
	else if( document.getElementById("txtSubcategory").value == 0)
	{
		alert("Please enter sub-category");
		document.getElementById("txtSubCategory").focus();
		return false;
	}
	/*else if( document.getElementById("txtPriority").value == 0)
	{
		alert("Please enter priority");
		document.getElementById("txtPriority").focus();
		return false;
	}
	*/
	else if(!IsNumeric(document.getElementById("txtPriority").value))
	{
		alert("Please enter only numerals (0 - 9)");
		document.getElementById("txtPriority").focus();
		return false;
	}
	else
		return true;
}
function ValidateAddRegion()
{
	if(document.getElementById("ddlCountry").selectedIndex == 0)
	{
		alert("Please select the country");
		document.getElementById("ddlCountry").focus();
		return false;
	}
	else if( document.getElementById("txtRegion").value == 0)
	{
		alert("Please enter region");
		document.getElementById("txtregion").focus();
		return false;
	}
	else if( document.getElementById("txtdescription").value == 0)
	{
		alert("Please enter description");
		document.getElementById("txtdescription").focus();
		return false;
	}
	else
		return true;
}
function ValidateBooking()
{
	if( document.getElementById("txtName").value == 0)
	{
		alert("Please enter name");
		document.getElementById("txtName").focus();
		return false;
	}
	else if( document.getElementById("txtFromEmailAddress").value == 0)
	{
		alert("Please enter email address");
		document.getElementById("txtFromEmailAddress").focus();
		return false;
	}
	else if(!Email_Check(document.getElementById("txtFromEmailAddress").value))
	{
		alert("Please enter valid email address");
		document.getElementById("txtFromEmailAddress").focus();
		return false;
	}
	
	else if( document.getElementById("txtTelephoneNumber").value == 0)
	{
		alert("Please enter telephone number");
		document.getElementById("txtTelephoneNumber").focus();
		return false;
	}
	
	else if( document.getElementById("txtStartDate").value == 0)
	{
		alert("Please enter start date");
		document.getElementById("buStartDate").focus();
		return false;
	}
	
	else if( document.getElementById("txtEndDate").value == 0)
	{
		alert("Please enter end date");
		document.getElementById("buEndDate").focus();
		return false;
	}
	
	else if( document.getElementById("txtGuests").value == 0)
	{
		alert("Please enter number of guests");
		document.getElementById("txtGuests").focus();
		return false;
	}
	else if(!IsNumeric(document.getElementById("txtGuests").value))
	{
		alert("Please enter only numerals (1 - 9)");
		document.getElementById("txtGuests").focus();
		return false;
	}
	else
		return true;
}

function ValidateAddImage()
{
	if(document.getElementById("ddlRegion").selectedIndex == 0)
	{
		alert("Please select the region");
		document.getElementById("ddlRegion").focus();
		return false;
	}
	else if(document.getElementById("ddlLocation").selectedIndex == 0)
	{
		alert("Please select the location");
		document.getElementById("ddlLocation").focus();
		return false;
	}
	else if(document.getElementById("imagefile").value ==0)
	{
		alert("Please select the image");
		document.getElementById("imagefile").focus();
		return false;
	}
	else if(document.getElementById("txtDescription").value ==0)
	{
		alert("Please enter the Description");
		document.getElementById("txtDescription").focus();
		return false;
	}
	else
		return true;
}

function ValidateEditImage()
{
	if(document.getElementById("ddlLocation").selectedIndex == 0)
	{
		alert("Please select the location");
		document.getElementById("ddlLocation").focus();
		return false;
	}
	else if(document.getElementById("txtDescription").value ==0)
	{
		alert("Please enter the Description");
		document.getElementById("txtDescription").focus();
		return false;
	}
	else
		return true;
}

function ValidateAddLocation()
{
	if( document.getElementById("ddlRegion").selectedIndex== 0)
	{
		alert("Please select region");
		document.getElementById("ddlRegion").focus();
		return false;
	}
	else if(document.getElementById("txtLocation").value == 0)
	{
		alert("Please enter location ");
		document.getElementById("txtLocation").focus();
		return false;
	}
	else if(document.getElementById("txtRooms").value == 0)
	{
		alert("Please enter number of rooms");
		document.getElementById("txtRooms").focus();
		return false;
	}
	else if(!IsNumeric(document.getElementById("txtRooms").value))
	{
		alert("Please enter only numerals (1 - 9)");
		document.getElementById("txtRooms").focus();
		return false;
	}
	else if(document.getElementById("txtBathrooms").value == 0)
	{
		alert("Please enter number of bathrooms");
		document.getElementById("txtBathrooms").focus();
		return false;
	}
	else if(!IsNumeric(document.getElementById("txtBathrooms").value))
	{
		alert("Please enter only numerals (1 - 9)");
		document.getElementById("txtBathrooms").focus();
		return false;
	}
	else if(document.getElementById("txtMaximumGuests").value == 0)
	{
		alert("Please enter maximum guests");
		document.getElementById("txtMaximumGuests").focus();
		return false;
	}
	else if(!IsNumeric(document.getElementById("txtMaximumGuests").value))
	{
		alert("Please enter only numerals (1 - 9)");
		document.getElementById("txtMaximumGuests").focus();
		return false;
	}
	/*
	else if(document.getElementById("txtAdditionalFacilities").value == 0)
	{
		alert("Please enter additional facilities");
		document.getElementById("txtAdditionalFacilities").focus();
		return false;
	}
	else if(document.getElementById("txtDescription").value == 0)
	{
		alert("Please enter description");
		document.getElementById("txtDescription").focus();
		return false;
	}
	*/
	else
		return true;
}