通过Javascript创建一个选择文件的对话框代码_javascript技巧

CSS 样式:复制代码代码如下:DIV.neat-dialog-cont {Z-INDEX: 98; BACKGROUND: none transparent scroll repeat 0% 0%; LEFT: 0px; WIDTH: 100%; POSITION: absolute; TOP: 0px; HEIGHT: 100%}DIV.neat-dialog-bg {Z-INDEX: -1; FILTER: alpha(opacity=70); LEFT: 0px; WIDTH: 100%; POSITION: absolute; TOP: 0px; HEIGHT: 100%; BACKGROUND-COLOR: #eee; opacity: 0.7;}DIV.neat-dialog {BORDER-RIGHT: #555 1px solid; BORDER-TOP: #555 1px solid; Z-INDEX: 99; MARGIN-LEFT: 35%; BORDER-LEFT: #555 1px solid; WIDTH: 300px; MARGIN-RIGHT: auto;BORDER-BOTTOM: #555 1px solid; POSITION: relative; TOP: 25%; BACKGROUND-COLOR: #fff}DIV.neat-dialog-title {PADDING-RIGHT: 0.3em; PADDING-LEFT: 0.3em; FONT-SIZE: 1em; PADDING-BOTTOM: 0.1em; MARGIN: 0px; LINE-HEIGHT: 1.2em; PADDING-TOP: 0.1em; BORDER-BOTTOM: #444 1px solid; POSITION: relative;background: #36C;color:White;}DIV.neat-dialog P {PADDING-RIGHT: 0.2em; PADDING-LEFT: 0.2em; PADDING-BOTTOM: 0.2em; PADDING-TOP: 0.2em; TEXT-ALIGN: center}Javascript 代码 ：复制代码代码如下://打开弹窗function f_OpenDialog() {var sHTML = '' +'' +'取消';new NeatDialog(sHTML, "请选择Excel文档!");}//关闭并移除弹窗NeatDialog.prototype.close = function () {if (this.elt) {this.elt.style.display = "none";this.elt.parentNode.removeChild(this.elt);}window.neatDialog = null;}//创建弹窗function NeatDialog(sHTML, sTitle) {window.neatDialog = null;this.elt = null;if (document.createElement && document.getElementById) {var dg = document.createElement("div");dg.className = "neat-dialog";if (sTitle) sHTML = '' + sTitle + '\n' + sHTML;dg.innerHTML = sHTML;var dbg = document.createElement("div");dbg.id = "nd-bdg";dbg.className = "neat-dialog-bg";var dgc = document.createElement("div");dgc.className = "neat-dialog-cont";dgc.appendChild(dbg);dgc.appendChild(dg);if (document.body.offsetLeft > 0) {dgc.style.marginLeft = document.body.offsetLeft + "px";}document.body.appendChild(dgc);this.elt = dgc;window.neatDialog = this;}}

效果：