//update search course	
function update_search_course() 
	{
		var element_id   = 'search_instance'
		var script_link  = 'scripts/ajax.php?script=update_search_course'
		var parameters   = '';
		
		parameters += 'category_id=' + encodeURIComponent( document.getElementById('category_id').value ) + '&'
		
		var course_select = document.getElementById('course_id');
		var course_length = course_select.options.length;
		var course_value  = ''
		var j             = 0;
		for (var i = 0 ; i < course_length; i++)
			{
				if (course_select.options[i].selected == true)
					{
						if (j == 0)
							{
								course_value = course_select.options[i].value;
							}
						else
							{
								course_value += ',' + course_select.options[i].value;
							}
							
						j++;							
					}	
			}
			
		parameters += 'course_id=' + encodeURIComponent( course_value ) + '&'
		parameters += 'location_id=' + encodeURIComponent( document.getElementById('location_id').value ) + '&'
		parameters += 'timeframe=' + encodeURIComponent( document.getElementById('timeframe').value ) + '&'

		call_ajax('post', element_id, script_link, parameters);
	}
	
//display course booking price based on user selections
function displayPrice()
	{
		var startDate   = document.getElementById('startDate').innerHTML;
		var payment_fee = document.getElementById('payment_fee').innerHTML;
		
		if (document.getElementsByName('payment_method'))
			{
				var payment_list   = document.getElementsByName('payment_method');
				var payment_length = payment_list.length;
		
				for (var i = 0; i < payment_length; i++) 
					{
						if (payment_list[i].checked === true) {
							var payment_method = payment_list[i].value
						}
					}
			}
		
		if (document.getElementById('no_students'))
			{
				var no_bookings = document.getElementById('no_students').value
			}
		else
			{
				var no_bookings = 0;
			}

		var element_id   = 'display_price'
		var script_link  = 'scripts/ajax.php?script=display_price&startDate='+startDate+'&payment_fee='+payment_fee+'&payment_method='+payment_method+'&no_bookings='+no_bookings
							
		//call php script
		call_ajax('get', element_id, script_link);
	}
	
	
	//display course booking price based on user selections
function displayPricePart()
	{
		var startDate   = document.getElementById('startDate').innerHTML;
		var payment_fee = document.getElementById('payment_fee').innerHTML;
		
		if (document.getElementsByName('payment_method'))
			{
				var payment_list   = document.getElementsByName('payment_method');
				var payment_length = payment_list.length;
		
				for (var i = 0; i < payment_length; i++) 
					{
						if (payment_list[i].checked === true) {
							var payment_method = payment_list[i].value
						}
					}
			}
		
		if (document.getElementById('no_students'))
			{
				var no_bookings = document.getElementById('no_students').value
			}
		else
			{
				var no_bookings = 0;
			}

		var element_id   = 'display_price'
		var script_link  = 'scripts/ajax.php?script=display_price_partner&startDate='+startDate+'&payment_fee='+payment_fee+'&payment_method='+payment_method+'&no_bookings='+no_bookings
							
		//call php script
		call_ajax('get', element_id, script_link);
	}