var $D = YAHOO.util.Dom;
	var $E = YAHOO.util.Event;
	var $ = $D.get;

 
 function getElementsByClass(searchClass,node,tag) {
	var classElements = new Array();
	if ( node == null )
		node = document;
	if ( tag == null )
		tag = '*';
	var els = node.getElementsByTagName(tag);
	var elsLen = els.length;
	var pattern = new RegExp("\\b"+searchClass+"\\b");
	for (i = 0, j = 0; i < elsLen; i++) {
		if ( pattern.test(els[i].className) ) {
			 	
			classElements[j] = els[i];
			j++;
		}
	}
	return classElements;
}
var top=10;
var bottom=1;

top_zindex = function(){
    $D.setStyle(this, 'z-index', top);
	}

bottom_zindex = function(){
    $D.setStyle(this, 'z-index', bottom);
	}



 var op_nav = $('op_nav');
 var os_nav = $('os_nav');
 var ps_nav = $('ps_nav');


 $D.setStyle(op_nav, 'display', 'none');
 $D.setStyle(os_nav, 'display', 'none');
 $D.setStyle(ps_nav, 'display', 'none');


show_op = new YAHOO.util.Anim('our_practice', {opacity:
{to: 1}, duration: 0.6});
show_op.onComplete.subscribe(top_zindex);

 show_op_nav = new YAHOO.util.Anim(op_nav, {opacity:
 {to: 1}, duration: 0.6});
 show_op_nav.onComplete.subscribe(function(){
	    $D.setStyle(op_nav, 'display', '');
	});

hide_op = new YAHOO.util.Anim('our_practice', {opacity:
{to: 0}, duration: 0.6});
hide_op.onComplete.subscribe(bottom_zindex);

 hide_op_nav = new YAHOO.util.Anim(op_nav, {opacity:
 {to: 0}, duration: 0.6});
 hide_op_nav.onComplete.subscribe(function(){
	 $D.setStyle(op_nav, 'display', 'none');
	});

show_os = new YAHOO.util.Anim('our_staff', {opacity:
{to: 1}, duration: 0.6});
show_os.onComplete.subscribe(top_zindex);

 show_os_nav = new YAHOO.util.Anim(os_nav, {opacity:
 {to: 1}, duration: 0.6});
 show_os_nav.onComplete.subscribe(function(){
	    $D.setStyle(os_nav, 'display', '');
	});

hide_os = new YAHOO.util.Anim('our_staff', {opacity:
{to: 0}, duration: 0.6});
hide_os.onComplete.subscribe(bottom_zindex);

 hide_os_nav = new YAHOO.util.Anim(os_nav, {opacity:
 {to: 0}, duration: 0.6});
 hide_os_nav.onComplete.subscribe(function(){
	   $D.setStyle(os_nav, 'display', 'none');
	});


show_h = new YAHOO.util.Anim('home', {opacity:
{to: 1}, duration: 0.6});
show_h.onComplete.subscribe(top_zindex);

hide_h = new YAHOO.util.Anim('home', {opacity:
{to: 0}, duration: 0.6});
hide_h.onComplete.subscribe(bottom_zindex);

show_ps = new YAHOO.util.Anim('patient_services', {opacity:
{to: 1}, duration: 0.6});
show_op.onComplete.subscribe(top_zindex);

 show_ps_nav = new YAHOO.util.Anim(ps_nav, {opacity:
 {to: 1}, duration: 0.6});
 show_ps_nav.onComplete.subscribe(function(){
	   $D.setStyle(ps_nav, 'display', '');
	});

hide_ps = new YAHOO.util.Anim('patient_services', {opacity:
{to: 0}, duration: 0.6});
hide_ps.onComplete.subscribe(bottom_zindex);

 hide_ps_nav = new YAHOO.util.Anim(ps_nav, {opacity:
 {to: 0}, duration: 0.6});
 hide_ps_nav.onComplete.subscribe(function(){
	   $D.setStyle(ps_nav, 'display', 'none');
	});

show_ml = new YAHOO.util.Anim('medical_links', {opacity:
{to: 1}, duration: 0.6});
show_ml.onComplete.subscribe(top_zindex);

hide_ml = new YAHOO.util.Anim('medical_links', {opacity:
{to: 0}, duration: 0.6});
hide_ml.onComplete.subscribe(bottom_zindex);

show_l = new YAHOO.util.Anim('lectures', {opacity:
{to: 1}, duration: 0.6});
show_l.onComplete.subscribe(top_zindex);

hide_l = new YAHOO.util.Anim('lectures', {opacity:
{to: 0}, duration: 0.6});
hide_l.onComplete.subscribe(bottom_zindex);

show_cu = new YAHOO.util.Anim('contact_us', {opacity:
{to: 1}, duration: 0.6});
show_cu.onComplete.subscribe(top_zindex);

hide_cu = new YAHOO.util.Anim('contact_us', {opacity:
{to: 0}, duration: 0.6});
hide_cu.onComplete.subscribe(bottom_zindex);

var s = getElementsByClass("flash", null, "a");

//$D.setStyle('our_practice', 'opacity', 0);
//$D.setStyle('our_staff', 'opacity', 0);

$E.addListener(s, 'mouseover', 
function(){
if(this.innerHTML == 'OUR PRACTICE'){
show_op.animate();
 show_op_nav.animate();
hide_h.animate();
hide_ps.animate();
 hide_ps_nav.animate();
hide_os.animate();
 hide_os_nav.animate();
hide_ml.animate();
hide_l.animate();
hide_cu.animate();
	}
if(this.innerHTML == 'OUR STAFF'){
show_os.animate();
 show_os_nav.animate();
hide_h.animate();
hide_ps.animate();
 hide_ps_nav.animate();
hide_ml.animate();
hide_l.animate();
hide_cu.animate();
hide_op.animate();
 hide_op_nav.animate();
	}
if(this.innerHTML == 'HOME'){
show_h.animate();
hide_os.animate();
 hide_os_nav.animate();
hide_ps.animate();
 hide_ps_nav.animate();
hide_ml.animate();
hide_l.animate();
hide_cu.animate();
hide_op.animate();
  hide_op_nav.animate();
	}
if(this.innerHTML == 'PATIENT SERVICES'){
show_ps.animate();
 show_ps_nav.animate();
hide_h.animate();
hide_os.animate();
 hide_os_nav.animate();
hide_ml.animate();
hide_l.animate();
hide_cu.animate();
hide_op.animate();
 hide_op_nav.animate();
	}
if(this.innerHTML == 'MEDICAL LINKS'){
show_ml.animate();
hide_h.animate();
hide_ps.animate();
 hide_ps_nav.animate();
hide_os.animate();
 hide_os_nav.animate();
hide_l.animate();
hide_cu.animate();
hide_op.animate();
 hide_op_nav.animate();
	}
if(this.innerHTML == 'LECTURES'){
show_l.animate();
hide_h.animate();
hide_ps.animate();
 hide_ps_nav.animate();
hide_ml.animate();
hide_os.animate();
 hide_os_nav.animate();
hide_cu.animate();
hide_op.animate();
 hide_op_nav.animate();
	}
if(this.innerHTML == 'CONTACT US'){
show_cu.animate();
hide_h.animate();
hide_ps.animate();
 hide_ps_nav.animate();
hide_ml.animate();
hide_l.animate();
hide_os.animate();
 hide_os_nav.animate();
hide_op.animate();
 hide_op_nav.animate();
	}

});