/*********************
//* jQuery Drop Line Menu- By Dynamic Drive: http://www.dynamicdrive.com/
//* Last updated: June 27th, 09'
//* Menu avaiable at DD CSS Library: http://www.dynamicdrive.com/style/
*********************/
(function($) {
	$.fn.hoverIntent = function(f,g) {
		// default configuration options
		var cfg = {
			sensitivity: 7,
			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);

var droplinemenu={

arrowimage: {classname: 'downarrowclass', src: 'images/down.gif', leftpadding: 5}, //customize down arrow image
animateduration: {over: 200, out: 200}, //duration of slide in/ out animation, in milliseconds

buildmenu:function(menuid){
	jQuery(document).ready(function($){
		var $mainmenu=$("#"+menuid+">ul")
		var $headers=$mainmenu.find("ul").parent()
		$headers.each(function(i){
			var $curobj=$(this)
			var $subul=$(this).find('ul:eq(0)')
			this._dimensions={h:$curobj.find('a:eq(0)').outerHeight()}
			this.istopheader=$curobj.parents("ul").length==1? true : false
			if (!this.istopheader)
				$subul.css({left:0, top:this._dimensions.h})
			var $innerheader=$curobj.children('a').eq(0)
			$innerheader=($innerheader.children().eq(0).is('span'))? $innerheader.children().eq(0) : $innerheader //if header contains inner SPAN, use that
			$innerheader.append(
				'<img src="'+ droplinemenu.arrowimage.src
				+'" class="' + droplinemenu.arrowimage.classname
				+ '" style="border:0; padding-left: '+droplinemenu.arrowimage.leftpadding+'px" />'
			)
			
			$curobj.hoverIntent(
				function(e){
					var $targetul=$(this).children("ul:eq(0)")
					if ($targetul.queue().length<=1) //if 1 or less queued animations
						if (this.istopheader)
							$targetul.css({left: $mainmenu.offset().left, top: $mainmenu.offset().top+this._dimensions.h})
						if (document.all && !window.XMLHttpRequest) //detect IE6 or less, fix issue with overflow
							$mainmenu.find('ul').css({overflow: (this.istopheader)? 'hidden' : 'visible'})
							$targetul.stop(false,true).slideDown(droplinemenu.animateduration.over)
				},
				function(e){
					var $targetul=$(this).children("ul:eq(0)")
					$targetul.stop(false,true).slideUp(droplinemenu.animateduration.out)
				}
			) //end hover

		}) //end $headers.each()
		$mainmenu.find("ul").css({display:'none', visibility:'visible', width:$mainmenu.width()})
	}) //end document.ready
}
}