cm=null;    //global varibale with visible layer; default = null;
hide_delay=100;  //delay for the menu in ms
tstat=0;  //timer activity
// detecting browser

cm_parent = null;

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;


//if (bolVisible = true) then Show Layers
//else Hide Layers

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 = "";
        
        }

      }
if ( (bolVisible==false) && (cm_parent!=null) ) { cm_parent.style.backgroundImage='url(images/template_images/menu_back.png)'; }
return 1;
}


//returning offSet
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")+el.offsetWidth+"px";
    m.style.top =  getPos(el,"Top")+"px";
    switchDiv(m,true);
    cm=m;
    } 
    if (el==null) { cm_parent=null; }
                  else { cm_parent=el; };

    if (m==null) { cm=null; };

}

function setBack(el,checker) {
 if ( (checker=='no') && (cm!=null) ) { show(null,null); }
 el.style.backgroundImage='url(images/template_images/menu_back1.png)'
}

function changeBack(el) {
 if (cm==null) { el.style.backgroundImage='url(images/template_images/menu_back.png)'; };
}


function hidemenu() {
  timer1=setTimeout("show(null,null)",hide_delay);
  tstat=1;
  return 1;
}

function cancelhide() {
 if (tstat==1) {
 clearTimeout(timer1);
 tstat=0;
 }
return 1;
}