/**
* hoverIntent r5 // 2007.03.27 // jQuery 1.1.2+
* <http://cherne.net/brian/resources/jquery.hoverIntent.html>
*
* @param  f  onMouseOver function || An object with configuration options
* @param  g  onMouseOut function  || Nothing (use configuration options object)
* @author    Brian Cherne <brian@cherne.net>
*/
(function($){
		  $.fn.hoverIntent=function(f,g){
			  // default configuration options
			  var cfg={
				  sensitivity:3,
				  interval:100,
				  timeout:0
				  };
			  // override configuration options with user supplied object
			  cfg=$.extend(cfg,g?{over:f,out:g}:f);
			  
			  // instantiate variables                 
			  // cX, cY = current X and Y position of mouse, updated by mousemove event                 
			  // pX, pY = previous X and Y position of mouse, set by mouseover and polling interval 
			  var cX,cY,pX,pY;
			  
			  // A private function for getting mouse position
			  var track=function(ev){
				  cX=ev.pageX;
				  cY=ev.pageY;
			  };
			  
			  // A private function for comparing current and previous mouse position
			  var compare=function(ev,ob){
				  ob.hoverIntent_t=clearTimeout(ob.hoverIntent_t);
				  // compare mouse positions to see if they've crossed the threshold
				  if((Math.abs(pX-cX)+Math.abs(pY-cY))<cfg.sensitivity){
					  $(ob).unbind("mousemove",track);
					  // set hoverIntent state to true (so mouseOut can be called)
					  ob.hoverIntent_s=1;
					  return cfg.over.apply(ob,[ev]);
				  }else{
					  // set previous coordinates for next time
					  pX=cX;pY=cY;
					  // use self-calling timeout, guarantees intervals are spaced out properly (avoids JavaScript timer bugs)
					  ob.hoverIntent_t=setTimeout(function(){compare(ev,ob);},cfg.interval);
				  }
			  };
			  
			  // A private function for delaying the mouseOut function
			  var delay=function(ev,ob){
				  ob.hoverIntent_t=clearTimeout(ob.hoverIntent_t);
				  ob.hoverIntent_s=0;
				  return cfg.out.apply(ob,[ev]);
			  };
			  
			  // A private function for handling mouse 'hovering'
			  var handleHover=function(e){
				  // next three lines copied from jQuery.hover, ignore children onMouseOver/onMouseOut
				  var p=(e.type=="mouseover"?e.fromElement:e.toElement)||e.relatedTarget;
				  while(p&&p!=this){try{p=p.parentNode;}catch(e){p=this;}}
				  if(p==this){return false;}
				  
				  // copy objects to be passed into t (required for event object to be passed in IE)
				  var ev=jQuery.extend({},e);
				  var ob=this;
				  
				  // cancel hoverIntent timer if it exists
				  if(ob.hoverIntent_t){ob.hoverIntent_t=clearTimeout(ob.hoverIntent_t);}
				  
				  // else e.type == "onmouseover"
				  if(e.type=="mouseover"){
					  // set "previous" X and Y position based on initial entry point
					  pX=ev.pageX;pY=ev.pageY;
					  // update "current" X and Y position based on mousemove
					  $(ob).bind("mousemove",track);
					  // start polling interval (self-calling timeout) to compare mouse coordinates over time
					  if(ob.hoverIntent_s!=1){ob.hoverIntent_t=setTimeout(function(){compare(ev,ob);},cfg.interval);}
					  
					  // else e.type == "onmouseout"
					  }else{
						  // unbind expensive mousemove event
						  $(ob).unbind("mousemove",track);
						  // if hoverIntent state is true, then call the mouseOut function after the specified delay
						  if(ob.hoverIntent_s==1){ob.hoverIntent_t=setTimeout(function(){delay(ev,ob);},cfg.timeout);}
					  }
				  };
				  // bind the function to the two event listeners
				  return this.mouseover(handleHover).mouseout(handleHover);
			  };
})(jQuery);