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如何檢查鼠標指針是否位於另一個div/id/a中?Javascript mouse location
^a href="#" onmouseover="showmenu('top_3_menu_1_1')">Option One</a>
function showmenu(elmnt)
{
document.getElementById(elmnt).style.visibility="visible";
}
function hidemenu(elmnt)
{
if mouse pointer is not in location A or B do something
}