function province_changed ()
    	{
    		disable ( $('select#region') );
    		$('select#region').val ( "" );

    		if ( $('select#province' ).val () != "" )
    		{		
    			var url = "/main/filter_regions";
    			var params = 'province_id=' + $('select#province' ).val();

    			$.ajax (
    				{
    					type: "POST",
    					url: url,
    					data: params,
    					complete: function ( xml, msg )
    					{
    					},
    					success: function ( data )
    					{
    						$('select#region').html ( data );
    						$('select#region').val ( "" );
    						enable ( $('select#region') );
    					}
    				}
    			);					
    		}
    	}
        
    function validate_email( checkEmail )
    {
        if ( ( checkEmail.indexOf('@') < 0 ) || ( ( checkEmail.charAt( checkEmail.length-4 ) != '.' ) && ( checkEmail.charAt( checkEmail.length-3 ) != '.' ) ) )
		{
			return false;
		}
		return true;
    }	
    
    function validate_registration ()
	{
		var errors = "Voltooi onderstaande!\n";
		var post = true;
		
		if ( $('input#firstname').val() == "" )
		{
			errors += "Naam\n";
			post = false;
		}
		
		if ( $('input#surname').val() == "" )
		{
			errors += "Van\n";
			post = false;
		}
		
		if ( $('input#username1').val() == "" )
		{
			errors += "Gebruiksnaam\n";
			post = false;
		}
		
		if ( $('input#password1').val() == "" )
		{
			errors += "Wagwoord\n";
			post = false;
		}
		
		if ( $('input#email').val() == "" )
		{
			errors += "Epos adres\n";
			post = false;
		}
		
        if ( $("input#email").val().length > 0 )
        {
            if ( validate_email( $("input#email").val() ) == false )
            {
                errors += "{INVALID_EMAIL}\n";
                sendme = false;
            }
        }        
        
		if ( post == false ) alert ( errors );
		return post;
	}
	
	function selection_changed ()
    	{
    		var area_count = $("#areas .short_list tr.data_row").size ();
    		
    		if ( area_count > 0 )
    		{
    			$(".buttons_table .button_wrapper.add_button").removeClass ( "disabled" );
    			$(".buttons_table .button_wrapper.reset_button").removeClass ( "disabled" );
    		} else {
    			$(".buttons_table .button_wrapper.add_button").addClass ( "disabled" );
    			$(".buttons_table .button_wrapper.reset_button").addClass ( "disabled" );
            }
        }
        
	$(document).ready ( function () {
    
        disable ( $('select#region') );
        $('select#province').change ( function () { province_changed(); } );
            
		$('input#filter_submit').click( function () {
				if ( validate_registration() == false )
				{
					return false;
				}
				else
				{
					$('input#filter_submit').submit();
				}
			});
		
        $('input#pregnancy_date').datepicker({createButton:true, dateFormat: 'yy-mm-dd'});
        $('input.date').datepicker({createButton:true, dateFormat: 'yy-mm-dd'});

        $("#province").change ( function ()
            {
                $("#areas input.value").trigger ( "click" );
            }
        );
			        
        $.multiselect ( "#areas", "/main/regions", {
                extra_options: {
						"province": "#province"
					},
                load_initial: false,
                onchange: function () {
					selection_changed ();}
                });
		});