var catgVales = 
'<option value="Not chosen">-Choose-</option>' +
'<option value="Internet">Internet</option>' +
'<option value="eDM">eDM</option>' +
'<option value="WSI Web Site">WSI Web Site</option>' +
'<option value="Print">Print</option>' +
'<option value="Electronic Media">Electronic Media</option>' +
'<option value="Outdoor">Outdoor</option>' +
'<option value="Direct Marketing">Direct Marketing</option>' +
'<option value="Event">Event</option>' +
'<option value="Joint Promotion">Joint Promotion</option>' +
'<option value="Mobile">Mobile</option>' +
'<option value="Referral & WOM">Referral & WOM</option>' +
'<option value="Others">Others</option>';

function refreshSupplier(catg){
	var opts = null;
	var selectedCatg = catg.value;
	var supplier = document.getElementById('student_supplier');
	
	if (selectedCatg == "Joint Promotion"){
		opts = new Array(new Option("-Choose-", "Not chosen"),
			new Option("DBS", "DBS"),
			new Option("Hang Seng - CU Promotion", "Hang Seng - CU Promotion"),
			new Option("HSBC SME", "HSBC SME"),
			new Option("UA Cinema", "UA Cinema"),
			new Option("Standard Chartered", "Standard Chartered"));
	} else if (selectedCatg == "Others"){
		opts =  new Array(new Option("-Choose-", "Not chosen"),
			new Option("Government Funding Listing", "Government Funding Listing"),
			new Option("Apple Daily Idiom Booklet Coupons", "Apple Daily Idiom Booklet Coupons"),
			new Option("WSI 2007 Calendar Coupons", "WSI 2007 Calendar Coupons"));
	} else if (selectedCatg == "eDM"){
		opts =  new Array(new Option("-Choose-", "Not chosen"),
			new Option("WSI", "WSI"),
			new Option("Sina", "Sina"),
			new Option("Job Market", "Job Market"),
			new Option("Recruit", "Recruit"),
			new Option("Jiu Jik", "Jiu Jik"),
			new Option("Beauty Exchange", "Beauty Exchange"),
			new Option("JobsDB", "JobsDB"),
			new Option("MSN", "MSN"));
	} else if (selectedCatg == "Event"){
		opts = new Array(new Option("-Choose-", "Not chosen"),
			new Option("Education & Career Expo", "Education & Career Expo"),
			new Option("Job Market Expo", "Job Market Expo"),
			new Option("Open House", "Open House"));
	} else if (selectedCatg == "Internet"){
		opts = new Array(new Option("-Choose-", "Not chosen"),
			new Option("Yahoo", "Yahoo"),
			new Option("MSN", "MSN"),
			new Option("Sina", "Sina"),
			new Option("Job Market", "Job Market"),
			new Option("Timway", "Timway"),
			new Option("Recruit", "Recruit"),
			new Option("Jiu Jik", "Jiu Jik"),
			new Option("Google", "Google"),
			new Option("TVB", "TVB"),
			new Option("Apple Daily", "Apple Daily"),
			new Option("JobsDB", "JobsDB"),
			new Option("Discuss", "Discuss"),
			new Option("Orisun", "Orisun"),
			new Option("Search Engine", "Search Engine"));
	} else if (selectedCatg == "Direct Marketing"){
		opts = new Array(new Option("-Choose-", "Not chosen"),
			new Option("HK Post - Mail Drop", "HK Post - Mail Drop"),
			new Option("Hand Distribution", "Hand Distribution"));
	} else if (selectedCatg == "Outdoor"){
		opts = new Array(new Option("-Choose-", "Not chosen"),
			new Option("MTR", "MTR"),
			new Option("KCR", "KCR"),
			new Option("Signage & Billboard", "Signage & Billboard"));
	} else if (selectedCatg == "Print"){
		opts = new Array(new Option("-Choose-", "Not chosen"),
			new Option("Apple Daily", "Apple Daily"),
			new Option("Job Market", "Job Market"),
			new Option("Recruit", "Recruit"),
			new Option("Jiu Jik", "Jiu Jik"),
			new Option("Metro Daily", "Metro Daily"),
			new Option("Metrolife", "Metrolife"));
	} else if (selectedCatg == "Electronic Media"){
		opts = new Array(new Option("-Choose-", "Not chosen"),
			new Option("Commercial Radio 1", "Commercial Radio 1"),
			new Option("Commercial Radio 2", "Commercial Radio 2"),
			new Option("Metro Showbiz", "Metro Showbiz"),
			new Option("TVB", "TVB"));
	} else if (selectedCatg == "Referral & WOM"){
		opts = new Array(new Option("-Choose-", "Not chosen"),
			new Option("Referral", "Referral"),
			new Option("Word Of Mouth", "Word Of Mouth"));
	} else if (selectedCatg == "WSI Web Site"){
		opts = new Array(new Option("-Choose-", "Not chosen"),
			new Option("WSI Web Site", "WSI Web Site"));
	} else if (selectedCatg == "Mobile"){
		opts = new Array(new Option("-Choose-", "Not chosen"),
			new Option("Smartone WAP Promotion", "Smartone WAP Promotion"));
	}else{
		opts = new Array(new Option("-Choose-", "Not chosen"));
	}

	for (i=supplier.options.length-1; i >= 0 ; i--){
		supplier.options[i] = null;
	}

	for (i=0; i < opts.length; i++){
		supplier.options[i] = opts[i];
	}
}

function printCentreOptions(){
	var opt = '';

	var centres = new Array('<option value="HK1">Causeway Bay</option>',
	'<option value="HK2">Yau Tsim Mong</option>',
	'<option value="HK3">Tsuen Wan</option>',
	'<option value="HK4">Kwun Tong</option>',
	'<option value="HK7">Shatin</option>');

	var count = 0;
	var pos = 0;

	while (count < 5){
		pos = Math.floor(5*Math.random())
		if (centres[pos] != ''){
			opt = opt + centres[pos];
			centres[pos] = '';
			count = count + 1;
		}
	}
	return opt;
}