var NS4 = (document.layers) ? true : false;
var IE4 = (document.all) ? true : false;
var menuShowing = false;
var mouseOverMenu = false;

function m_over() {
  mouseOverMenu=true;
	if(menuShowing) {
		//do nothing
	} else {
		menuShowing=true;popUp("practiceMenu"); 	
	}
} 

function m_out() {
//	mouseOverMenu=false;
//	setTimeout( "timer_out();", 500 );
} 

function m_click() {
  menuShowing=false;popOut('practiceMenu');
}

function timer_out() {
  if(mouseOverMenu) {
    // do nothing
  } else {
    if(menuShowing) {
      menuShowing=false;popOut('practiceMenu');
    } 
}
}
   


function popUp(d) {
	if(IE4){
		var divObject= eval(d+".style");
		divObject.visibility = "visible";
		document.all[d].style.display = "block";
	}
}


function popOut(d) {
	if(IE4){
		var divObject= eval(d+".style");
		divObject.visibility = "hidden";
		document.all[d].style.display = "none";
	}
}