效果图
JS代码
//上下键 选择事件 searchBackgroud 为样式,只做标记,无实质样式,因为和其他样式不兼容,只能添加CSS$(document).keydown(function (event) {var upDownClickNum = $("#SearchTips .searchBackgroud ").length;if ($("#SearchTips").css("display") == "block") {alert(event.keyCode)//38:上 40:下if (event.keyCode == 38) {if (upDownClickNum < 1) {$("#SearchTips li:last a").css({ "background": "#f0f0f0" }).addClass("searchBackgroud");} else {$("#SearchTips .searchBackgroud ").removeClass("searchBackgroud").css({ "background": "" }).parent().prev().children().addClass("searchBackgroud").css({ "background": "#f0f0f0" });}stopDefault(event);//不阻止光标户向前移动} else if (event.keyCode == 40) {if (upDownClickNum < 1) {$("#SearchTips li:first a").css({ "background": "#f0f0f0" }).addClass("searchBackgroud");} else {$("#SearchTips .searchBackgroud").removeClass("searchBackgroud").css({ "background": "" }).parent().next().children().addClass("searchBackgroud").css({ "background": "#f0f0f0" });}stopDefault(event);}upDownClickNum++;}});//阻止事件执行function stopDefault(e) {//阻止默认浏览器动作(W3C) if (e && e.preventDefault) {//火狐的 事件是传进来的e e.preventDefault();}//IE中阻止函数器默认动作的方式 else {//ie 用的是默认的event event.returnValue = false;}}
html代码
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