if (browserType == "gecko" )
document.poppedLayer =
eval('document.getElementById("realtooltip")');
else if (browserType == "ie")
document.poppedLayer =
eval('document.getElementById("realtooltip")');
else
document.poppedLayer =
eval('document.layers["realtooltip"]');
document.poppedLayer.style.visibility = "hidden";
上面代码中用到了poppedLayer,我想了解一下什么是poppedLayer?如果有人可以给我有关它的文档的参考。