function getAbsTop(obj){ //得到对象的绝对y坐标
	var myTop=0;
	myTop+=obj.offsetTop;
	if(obj.offsetParent!=null) myTop+=getAbsTop(obj.offsetParent);
	
	return myTop;
}
function getAbsLeft(obj)
{
	var myLeft=0;
	myLeft+=obj.offsetLeft;
	if(obj.offsetParent!=null) myLeft+=getAbsLeft(obj.offsetParent);
	
	return myLeft;

}
function showpic(o,src,id)
{
	var showimg =  document.getElementById(id);
	showimg.style.left =getAbsLeft(src);
	showimg.style.top = getAbsTop(o)+18;
	showimg.style.display = "block";
	
}
function hiddenpic(id)
{
	var showimg =  document.getElementById(id);
	showimg.style.display = "none";
	//tmp_object.style.visibility = "visible";
}