var curLink = "";

function pv(e, num) {
	var span = document.getElementById("pv" +num);
	if (curLink != "") {
		curLink.style.display = "none";
	}
	curLink = span;

	if (!document.all) {
		span.style.left = e.pageX;
		span.style.top = e.pageY+30;
	} else {
		//span.style.pixelLeft = e.offsetX+190;
		//span.style.pixelTop = e.offsetY+110;
		op = e.srcElement.offsetParent;
		span.style.pixelLeft = e.clientX+document.body.scrollLeft;
		span.style.pixelTop = e.clientY+document.body.scrollTop+30;
	}
	span.style.display="block";
}

function unpv(num) {
	var span = document.getElementById("pv" +num);
	span.style.display = "none";
}