;(function($) {
    $.fn.captcha = function(options) {


        var defaults = {
            borderColor: "",
            captchaDir: "/captcha",
            url: "../captcha/captcha.aspx",
            formId: "form",
            text: "Verify that you are a human,<br />drag <span>scissors</span> into the circle.",
            items: Array("pencil", "scissors", "clock", "heart", "note"),
            controlId: "btnSaveAjax"
        };

        var options = $.extend(defaults, options);

        $(this).html("<b class='ajax-fc-rtop'><b class='ajax-fc-r1'></b> <b class='ajax-fc-r2'></b> <b class='ajax-fc-r3'></b> <b class='ajax-fc-r4'></b></b><img class='ajax-fc-border' id='ajax-fc-left' src='" + options.captchaDir + "/imgs/border-left.png' /><img class='ajax-fc-border' id='ajax-fc-right' src='" + options.captchaDir + "/imgs/border-right.png' /><div id='ajax-fc-content'><div id='ajax-fc-left'><p id='ajax-fc-task'>" + options.text + "</p><ul id='ajax-fc-task'><li class='ajax-fc-0'><img src='" + options.captchaDir + "/imgs/item-none.png' alt='' /></li><li class='ajax-fc-1'><img src='" + options.captchaDir + "/imgs/item-none.png' alt='' /></li><li class='ajax-fc-2'><img src='" + options.captchaDir + "/imgs/item-none.png' alt='' /></li><li class='ajax-fc-3'><img src='" + options.captchaDir + "/imgs/item-none.png' alt='' /></li><li class='ajax-fc-4'><img src='" + options.captchaDir + "/imgs/item-none.png' alt='' /></li></ul></div><div id='ajax-fc-right'><a target='_blank' href='http://www.webdesignbeach.com'><img id='ajax-fc-backlink' src='" + options.captchaDir + "/imgs/wdb.png' alt='Web Design Beach' /></a><p id='ajax-fc-circle'></p></div></div><div id='ajax-fc-corner-spacer'></div><b class='ajax-fc-rbottom'><b class='ajax-fc-r4'></b> <b class='ajax-fc-r3'></b> <b class='ajax-fc-r2'></b> <b class='ajax-fc-r1'></b></b>");
	var rand = $.ajax({ url: options.url, async: false }).responseText;

	var pic = randomNumber();
        $(".ajax-fc-" + rand).html("<img src=\"" + options.captchaDir + "/imgs/item-" + options.items[pic] + ".png\" alt=\"\" />");
	$("p#ajax-fc-task span").html(options.items[pic]);
        $(".ajax-fc-" + rand).addClass('ajax-fc-highlighted');
        $(".ajax-fc-" + rand).draggable({ containment: '#ajax-fc-content' });
        var used = Array();
        for (var i = 0; i < 5; i++) {
            if (i != rand && i != pic) {
                $(".ajax-fc-" + i).html("<img src=\"" + options.captchaDir + "/imgs/item-" + options.items[i] + ".png\" alt=\"\" />");
                used[i] = options.items[i];
            }
        }
        $(".ajax-fc-container, .ajax-fc-rtop *, .ajax-fc-rbottom *").css("background-color", options.borderColor);
        $("#ajax-fc-circle").droppable({
            drop: function(event, ui) {
                $(".ajax-fc-" + rand).draggable("disable");
                $("#captcha").val(rand);
		$("#" + options.controlId).removeAttr("disabled");
            },
            tolerance: 'touch'
        });
    };

})(jQuery);

function randomNumber() {
	var chars = "01234";
	chars += ".";
	var size = 1;
	var i = 1;
	var ret = "";
		while ( i <= size ) {
			$max = chars.length-1;
			$num = Math.floor(Math.random()*$max);
			$temp = chars.substr($num, 1);
			ret += $temp;
			i++;
		}
	return ret;
}