function Start(tag)
{
	var leftpos = 0;
	var toppos = 0;
	var aTag = tag;
	do{
		leftpos	+= aTag.offsetLeft;
		toppos += aTag.offsetTop;
		aTag = aTag.offsetParent;
	}while(aTag.tagName != "BODY");
	toppos = toppos*1+tag.offsetHeight;
	document.getElementById("but_menu").style.left = leftpos+"px";
	document.getElementById("but_menu").style.top = toppos+"px";
	document.getElementById("but_menu").style.display = "block";
} 
function end()
{
	document.getElementById("but_menu").style.display = "none";
}