if (document.images){

       m1on=new Image();

       m1on.src="images/topbt2_treatment.gif";

       m1off=new Image();

       m1off.src="images/topbt1_treatment.gif";

       m2on=new Image();

       m2on.src="images/topbt2_facilities.gif";

       m2off=new Image();

       m2off.src="images/topbt1_facilities.gif";

       m3on=new Image();

       m3on.src="images/topbt2_scedule.gif";

       m3off=new Image();

       m3off.src="images/topbt1_scedule.gif";

       m4on=new Image();

       m4on.src="images/topbt2_staff.gif";

       m4off=new Image();

       m4off.src="images/topbt1_staff.gif";

       m5on=new Image();

       m5on.src="images/topbt2_resources.gif";

       m5off=new Image();

       m5off.src="images/topbt1_resources.gif";

       m6on=new Image();

       m6on.src="images/topbt2_articles.gif";

       m6off=new Image();

       m6off.src="images/topbt1_articles.gif";

     }

  function imgOn(imgName){

    if (document.images){

       document[imgName].src=eval(imgName+"on.src" );

    }

  }

  function imgOff(imgName){

    if (document.images){

      document[imgName].src=eval(imgName+"off.src");

    }

  }

  

cm=null;

hide_delay=200;

tstat=0;



isNS4 = (document.layers) ? true : false;

isIE4 = (document.all && !document.getElementById) ? true : false;

isIE5 = (document.all && document.getElementById) ? true : false;

isNS6 = (!document.all && document.getElementById) ? true : false;



function switchDiv(objElement,bolVisible){

if(isNS4||isIE4){

     if(!bolVisible) {

       objElement.visibility ="hidden"

     } else {

       objElement.visibility ="visible"

     }     

 } else if (isIE5 || isNS6) {

      if(!bolVisible){

         objElement.style.display = "none";

         

      } else {

        objElement.style.display = "";

        

        }



      }



return 1;

}



function getPos(el,sProp) {

	var iPos = 0;

	while (el!=null) {

		iPos+=el["offset" + sProp]

		el = el.offsetParent

	}

	return iPos



}



function getelementbyid(myid) {

   if (isNS4){

        objElement = document.layers[myid];

     }else if (isIE4) {

        objElement = document.all[myid];

     }else if (isIE5 || isNS6) {

             objElement = document.getElementById(myid);

     }

return(objElement);

}



function show(el,m) {

 if (cm!=null) {

 switchDiv(cm,false);

 }

 if (m!=null) {

 m=getelementbyid(m);

 m.style.left = getPos(el,"Left")+"px";

 m.style.top =  getPos(el,"Top")+el.offsetHeight+"px";

 switchDiv(m,true);

 cm=m;

 }



}

function hidemenu() {



timer1=setTimeout("show(null,null)",hide_delay);



tstat=1;



return 1;

}



function cancelhide() {

 if (tstat==1) {

 clearTimeout(timer1);

 tstat=0;

 }

return 1;

}