Question

这是我的javascript函数，用于检查上传的文件是否为图像格式类型！目前我已使用默认警报框返回错误消息！

 var _validFileExtensions = [".jpg", ".jpeg", ".bmp", ".gif", ".png"];    
function Validate(oForm) {
    var arrInputs = oForm.getElementsByTagName("input");
    for (var i = 0; i < arrInputs.length; i++) {
        var oInput = arrInputs[i];
        if (oInput.type == "file") {
            var sFileName = oInput.value;
            if (sFileName.length > 0) {
                var blnValid = false;
                for (var j = 0; j < _validFileExtensions.length; j++) {
                    var sCurExtension = _validFileExtensions[j];
                    if (sFileName.substr(sFileName.length - sCurExtension.length, sCurExtension.length).toLowerCase() == sCurExtension.toLowerCase()) {
                        blnValid = true;
                        break;
                    }
                }

                if (!blnValid) {

                    alert("Sorry a dig copy may be in a different file format! Formats allowed are " + _validFileExtensions.join(", "));

                    return false;
                }
            }
        }
    }

    return true;
}

以下代码提供了一个自定义对话框，我想调用它而不是默认框

<style>
            #white-background{
                display: none;
                width: 100%;
                height: 100%;
                position: fixed;
                top: 0px;
                left: 0px;
                background-color: #fefefe;
                opacity: 0.7;
                z-index: 9999;
            }

            #dlgbox{
                /*initially dialog box is hidden*/
                display: none;
                position: fixed;
                width: 480px;
                z-index: 9999;
                border-radius: 10px;
                background-color: #7c7d7e;

            }

            #dlg-header{
                background-color:aliceblue;
                color: white;
                font-size: 20px;
                padding: 10px;
                margin: 10px 10px 0px 10px;
            }

            #dlg-body{
                background-color: white;
                color: black;
                font-size: 14px;
                padding: 10px;
                margin: 0px 10px 0px 10px;
            }

            #dlg-footer{
                background-color: #f2f2f2;
                text-align: right;
                padding: 10px;
                margin: 0px 10px 10px 10px;
            }

            #dlg-footer button{
                background-color: grey;
                color: white;
                padding: 5px;
                border: 0px;
            }
        </style>
    </head>
    <body>
        <!-- dialog box -->
        <div id="white-background">
        </div>
        <div id="dlgbox">
            <div id="dlg-header"></div>
            <div id="dlg-body">Sorry a dig copy may be in a different file format! Formats allowed are ".jpg", ".jpeg", ".bmp", ".gif", ".png"</div>
            <div id="dlg-footer">
                <button onclick="dlgLogin()">Ok</button>
            </div>
        </div>

        <!-- rest of the page -->
        <h1>Dialog Box Demo</h1>
        <p>This is a dialog box example.</p>
        <p>Feel free to experiment with the code.</p>
        <p>Click the button below to see the dialog box.</p>
        <button onclick="showDialog()">Click Me!</button>

        <!-- script of dialog -->
        <script>
            function dlgLogin(){
                var whitebg = document.getElementById("white-background");
                var dlg = document.getElementById("dlgbox");
                whitebg.style.display = "none";
                dlg.style.display = "none";
            }

            function showDialog(){
                var whitebg = document.getElementById("white-background");
                var dlg = document.getElementById("dlgbox");
                whitebg.style.display = "block";
                dlg.style.display = "block";

                var winWidth = window.innerWidth;
                var winHeight = window.innerHeight;

                dlg.style.left = (winWidth/2) - 480/2 + "px";
                dlg.style.top = "150px";
            }
        </script>

请帮我将第二个代码集成到第一个代码中，以便我可以返回自定义对话框而不是默认警报框

Answer 1

您可以在how to change the style of alert box

找到答案

The alert box is a system object, and not subject to CSS. To do this style of thing you would need to create an HTML element and mimic the alert() functionality. The jQuery UI Modal box does a lot of the work for you, working basically as I have described: Link.

从条件javascript函数返回自定义对话框

1 个答案: