HTML5 新属性placeholder 兼容ie

啥都不说了，直接上代码

 1 <!DOCTYPE HTML>
 2 <html>
 3 <head>
 4 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 5 <title>无标题文档</title>
 6 <script type="text/javascript" src="por.js"></script>
 7 </head>
 8 <body>
 9 <div style="padding-top:20px;">
10     <input   placeholder="请输入你的姓名"  type="text" />
11 </div>
15 </body>
16 </html>

por.js

//placeholder IE8
var _placeholderSupport = function() {
    var t = document.createElement("input");
    t.type = "text";
    return (typeof t.placeholder !== "undefined");
}();
window.onload = function() {
    var arrInputs = document.getElementsByTagName("input");
    for (var i = 0; i < arrInputs.length; i++) {
        var curInput = arrInputs[i];
        if (!curInput.type || curInput.type == "" || curInput.type == "text")
            HandlePlaceholder(curInput);
    }
};
function HandlePlaceholder(oTextbox) {
    if (!_placeholderSupport) {
        var curPlaceholder = oTextbox.getAttribute("placeholder");
        if (curPlaceholder && curPlaceholder.length > 0) {
            oTextbox.value = curPlaceholder;
            oTextbox.setAttribute("old_color", oTextbox.style.color);
            oTextbox.style.color = "#c0c0c0";
            oTextbox.onfocus = function() {
                this.style.color = this.getAttribute("old_color");
                if (this.value === curPlaceholder)
                    this.value = "";
            };
            oTextbox.onblur = function() {
                if (this.value === "") {
                    this.style.color = "#c0c0c0";
                    this.value = curPlaceholder;
                }
            }
        }
    }
}

不适合密码框 - -

原文地址：http://www.cnblogs.com/jiaweniv/p/4918055.html

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