var timeID
var fadeStep=50	//½¥ÏÔËÙ¶È(ms)
function showTitle(note){
var obj=document.getElementById('photoTitle')
obj.style.left=event.x
obj.style.top=event.y
obj.innerHTML=note
clearInterval(timeID)
timeID=setInterval(fadeIn,5)
}

function fadeIn(){
var obj=document.getElementById('photoTitle')
if (obj.filters.Alpha.opacity-fadeStep<100){
	obj.filters.Alpha.opacity+=fadeStep;
}
}

function hideTitle(){
var obj=document.getElementById('photoTitle')
clearInterval(timeID)
obj.filters.Alpha.opacity=0;
}