function checkData(w) {



	if (w.firstname  && !validName(w.firstname.value, "First Name"))

	{	w.firstname.focus();

		return false;

	}

	

	if (w.lastname && !validName(w.lastname.value, "Last Name"))

	{	w.lastname.focus();

		return false;

	}



	if(w.company && w.company.value == "")

	{	alert("Please enter your company name.");

		w.company.focus();

		return false;

	}



	if(w.phone1 && !validNums(w.phone1.value, "Phone Number"))

	{	w.phone1.focus();

		return false;

	}

	

	if(w.fax1 && !validNums(w.fax1.value, "Fax Number"))

	{	w.fax1.focus();

		return false;

	}



	if(w.required_email && !validEmail(w.required_email.value, "Email Address"))

	{	w.required_email.focus();

		return false;

	}

	

	if (w.friendname  && !validName(w.friendname.value, "Friends Name"))

	{	w.friendname.focus();

		return false;

	}

	

	if(w.friendemail && !validEmail(w.friendemail.value, "Friends Email Address"))

	{	w.friendemail.focus();

		return false;

	}

		

	if(w.address && !validAddress(w.address.value, "Address"))

	{	w.address.focus();

		return false;

	}

	

	if(w.suburb && !validSuburb(w.suburb.value, "Suburb"))

	{	w.suburb.focus();

		return false;

	}

	

	if(w.city && !validCity(w.city.value, "City"))

	{	w.city.focus();

		return false;

	}



	// required field

	if (w.state.selectedIndex == 0)

	{	alert("Please choose a State.");

		w.state.focus();

		return false;

	}



	// if not empty, validate the contents

	if (w.post && !validpost(w.post.value, "Post Code"))

	{	w.post.focus();

		return false;

	}

	

	// required field

	if (w.comments && w.comments.value == "")

	{	alert("Please enter your comments.");

		w.comments.focus(); 

		return false;

	}

	

	if (w.ski_snowboard[0].checked == false && 

		w.ski_snowboard[1].checked == false) 

	{	alert("Please fill in all required fields.");

		w.ski_snowboard[0].focus();

		return false;

	}	

	

	if(w.age && w.age.value == "")

	{	alert("Please enter your age.");

		w.age.focus();

		return false;

	}	

	

	if (w.gender[0].checked == false && 

		w.gender[1].checked == false) 

	{	alert("Please choose a gender.");

		w.gender[0].focus();

		return false;

	}	

	

	if(w.where_else && w.where_else.value == "")

	{	alert("Please fill in all required fields.");

		w.where_else.focus();

		return false;

	}

	

	if (w.skill_level[0].checked == false && 

		w.skill_level[1].checked == false && 

		w.skill_level[2].checked == false) 

	{	alert("Please choose a skill level.");

		w.skill_level[0].focus();

		return false;

	}

	

	if(w.when_how_long && w.when_how_long.value == "")

	{	alert("Please fill in all required fields.");

		w.when_how_long.focus();

		return false;

	}

	

	if (w.accomodation_pref[0].checked == false && 

		w.accomodation_pref[1].checked == false) 

	{	alert("Please enter your accomodation preference.");

		w.accomodation_pref[0].focus();

		return false;

	}	

	

	if (w.ridden_powder[0].checked == false && 

		w.ridden_powder[1].checked == false) 

	{	alert("Please fill in all required fields.");

		w.ridden_powder[0].focus();

		return false;

	}

	

	if (w.been_to_india[0].checked == false && 

		w.been_to_india[1].checked == false) 

	{	alert("Please fill in all required fields.");

		w.been_to_india[0].focus();

		return false;

	}

	

	if (w.prefer_style[0].checked == false && 

		w.prefer_style[1].checked == false) 

	{	alert("Please fill in all required fields.");

		w.prefer_style[0].focus();

		return false;

	}



	if (w.kashmir_culture[0].checked == false && 

		w.kashmir_culture[1].checked == false && 

		w.kashmir_culture[2].checked == false) 

	{	alert("Please fill in all required fields.");

		w.kashmir_culture[0].focus();

		return false;

	}

	

	if(w.whats_important_resort && w.whats_important_resort.value == "")

	{	alert("Please fill in all required fields.");

		w.whats_important_resort.focus();

		return false;

	}

	

	if(w.whats_important_travel && w.whats_important_travel.value == "")

	{	alert("Please fill in all required fields.");

		w.whats_important_travel.focus();

		return false;

	}

	

	if (w.i_agree && w.i_agree.checked != true)

	{	alert("You must agree to the terms and conditions.");

		w.i_agree.focus(); 

		return false;

	}

	return true;

}



function validName(n, t)

{	if (n == "")

	{	alert("Please enter your "+ t +".")

		return false;

	}

	else

	{	var Chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ ";

		for (var i = 0; i < n.length; i++)

		{	if (Chars.indexOf(n.charAt(i)) == -1)

			{	alert ("Please enter a valid "+ t +".")

				return false

			}

		}

	}



	return true;

}



function validNums(n, t)

{	if (n == "")

	{	alert("Please enter a "+ t +".")

		return false;

	}

	else

	{	var Chars = "0123456789";

		for (var i = 0; i < n.length; i++)

		{	if (Chars.indexOf(n.charAt(i)) == -1)

			{	alert ("Please enter only numbers in "+ t +".")

				return false

			}

		}

	}

	

	return true;

}





function validEmail(e, t)

{	

	if (e == "")

	{

		alert("Please enter your "+t);

		return false;

	}

	var emailStr = e;

	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 + "|" + specialChars + ")";

	var userPat=new RegExp("^" + word + "(\\." + word + ")*$");

	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$");

	var matchArray=emailStr.match(emailPat);

	if (matchArray==null)

	{	alert("Your "+ t +" seems incorrect. Please check @ and .'s!");

		return false;

	}



	var user=matchArray[1];

	var domain=matchArray[2];

	if (user.match(userPat)==null)

	{	alert("Please do not use any symbols (ie. quotes or asterisks) other than @ in your "+ t +".");

		return false;

	}



	var IPArray=domain.match(ipDomainPat);

	if (IPArray!=null)

	{  for (var i=1;i<=4;i++)

		  {	if (IPArray[i]>255)

			{	alert("Destination IP address is invalid!");

				return false;

			}

		}

	}



	var domainArray=domain.match(domainPat)

	if (domainArray==null)

	{	alert("Your "+ t +" domain name doesn't seem to be valid.");

		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("Your "+ t +" must end in a three-letter domain, or two letter country.");

		return false;

	}



	var Chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";

	if (domArr[domArr.length-1].length == 2 || domArr[domArr.length-1].length == 3)

	{	for (var i = 0; i < domArr[domArr.length-1].length; i++)

		{	if (Chars.indexOf(domArr[domArr.length-1].charAt(i)) == -1)

			{	alert("The domain name can only contain letters.");

				return false;

			}

		}

	}



	if (len<2 || len>3)

	{	alert("Your "+ t +" is missing a hostname!");

		return false;

	}



	return true;

}



function validCompany(n, t)

{	if (n == "")

	{	alert("Please enter your "+ t +".")

		return false;

	}

	else

	{	var Chars = "1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ -";

		for (var i = 0; i < n.length; i++)

		{	if (Chars.indexOf(n.charAt(i)) == -1)

			{	alert ("Please enter a valid "+ t +".")

				return false

			}

		}

	}



	return true;

}



function validAddress(n, t)

{	if (n == "")

	{	alert("Please enter your "+ t +".")

		return false;

	}

	else

	{	var Chars = "1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ -";

		for (var i = 0; i < n.length; i++)

		{	if (Chars.indexOf(n.charAt(i)) == -1)

			{	alert ("Please enter a valid "+ t +".")

				return false

			}

		}

	}



	return true;

}



function validSuburb(n, t)

{	if (n == "")

	{	alert("Please enter your "+ t +".")

		return false;

	}

	else

	{	var Chars = "1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ -";

		for (var i = 0; i < n.length; i++)

		{	if (Chars.indexOf(n.charAt(i)) == -1)

			{	alert ("Please enter a valid "+ t +".")

				return false

			}

		}

	}



	return true;

}



function validCity(n, t)

{	if (n == "")

	{	alert("Please enter your "+ t +".")

		return false;

	}

	else

	{	var Chars = "1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ -";

		for (var i = 0; i < n.length; i++)

		{	if (Chars.indexOf(n.charAt(i)) == -1)

			{	alert ("Please enter a valid "+ t +".")

				return false

			}

		}

	}



	return true;

}





function validpost(z, t) {

	if (z == "")

	{	alert("Please fill in your "+ t +".");

		return false; 

	}

	else

	{	// check to see that the value contains at least 4 numbers

		if (z.length < 4)

		{	alert ("Please enter at least 4 numbers into the "+ t +" field.");

			return false;

		}

		// check to see that the value contains either 5 or 10 numbers

		if (z.length > 4 )

		{	alert ("Your post code must only contain 4 digits.");

			return false;

		}

		// check to see that the value contains only numbers

		var nums = "0123456789";

		for (var i = 0; i < z.length; i++)

		{	if (nums.indexOf(z.charAt(i)) == -1)

			{	alert ("Please enter only numbers into the "+ t +" field.");

				return false;

			}

		}

	}

	

	return true;

}