//用于决定下拉菜单的代码
function getPos(el,sProp) { 
    var iPos = 0
    while (el!=null) {
        iPos+=el["offset" + sProp]
        el = el.offsetParent
    }
	return iPos
}

function pozi(sa,left,top){ 
	//menuwenxue.style.visibility="visible" 
	//menuwenxue.style.left=left
	//menuwenxue.style.top=top

    sa.style.visibility="visible" 
	sa.style.left=left-7
	sa.style.top=top-22

} 
     
function mOvr(src, cOvr,item) 
{
	if (!src.contains(event.fromElement)) {src.style.cursor = "default";src.bgColor = cOvr;}
	item.style.color = "#ffffff"; 
}
function mOut(src, cOut,item) 
	{if (!src.contains(event.toElement)) {src.style.cursor = "default";src.bgColor = cOut;}
	item.style.color = "#000000";
}

function showmenu(menu){ 
	menu.style.visibility="visible" 
} 
function hidemenu(menu){ 
	menu.style.visibility="hidden" 
}