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1 window.addEventListener("scroll", function () {2 if (document.body.scrollTop >= window.innerHeight) {3 document.getElementById("top_back").style.display = "block";4 } else {5 document.getElementById("top_back").style.display = "none";6 }7 }docum 阅读全文
posted @ 2014-01-22 22:13
daishuguang
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http://mobile.51cto.com/web-321960.htm 阅读全文
posted @ 2014-01-22 17:10
daishuguang
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ALT + /F2Ctrl + Shift + O 阅读全文
posted @ 2014-01-22 03:10
daishuguang
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