js导航冻结在顶部滚动一直显示效果,兼容ie6+
js导航冻结在顶部滚动一直显示效果,兼容ie6+.
css:
.floatnv{position:fixed;_position:absolute;top:0px;z-index:999;width:100%; left:0;right:0;margin:auto}
js:
$(function () { var oDiv = document.getElementById("menu"); var H = 0, iE6; var Y = oDiv; while (Y) { H += Y.offsetTop; Y = Y.offsetParent; } ; iE6 = window.ActiveXObject && !window.XMLHttpRequest; if (!iE6) { window.onscroll = function () { var s = document.body.scrollTop || document.documentElement.scrollTop; if (s > H) { oDiv.className = "floatnv"; if (iE6) { oDiv.style.top = (s - H) + "px"; } } else { oDiv.className = ""; } } } });
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