/**
 * jQuery mousehold plugin - fires an event while the mouse is clicked down.
 * Additionally, the function, when executed, is passed a single
 * argument representing the count of times the event has been fired during
 * this session of the mouse hold.
 *
 * @author Remy Sharp (leftlogic.com)
 * @date 2006-12-15
 * @example $("img").mousehold(200, function(i){  })
 * @desc Repeats firing the passed function while the mouse is clicked down
 *
 * @name mousehold
 * @type jQuery
 * @param Number timeout The frequency to repeat the event in milliseconds
 * @param Function fn A function to execute
 * @cat Plugin
 */

jQuery.fn.mousehold = function(timeout, f) {
	if (timeout && typeof timeout == 'function') {
		f = timeout;
		timeout = 100;
	}
	if (f && typeof f == 'function') {
		var timer = 0;
		var fireStep = 0;
		return this.each(function() {
			jQuery(this).mousedown(function() {
				fireStep = 1;
				var ctr = 0;
				var t = this;
				timer = setInterval(function() {
					ctr++;
					f.call(t, ctr);
					fireStep = 2;
				}, timeout);
			})

			clearMousehold = function() {
				clearInterval(timer);
				if (fireStep == 1) f.call(this, 1);
				fireStep = 0;
			}
			
			jQuery(this).mouseout(clearMousehold);
			jQuery(this).mouseup(clearMousehold);
		})
	}
};