UI設計文本框解決Placeholder的在IE10 如下 IE 9 IE8 IE 7 的兼容問題

建立JS文件 placeholderfriend.js

(function($) { /** * 牛叉的解決方案 */

  var placeholderfriend = { focus: function(s) { s = $(s).hide().prev().show().focus(); var idValue = s.attr("id"); if (idValue) { s.attr("id", idValue.replace("placeholderfriend", "")); } var clsValue = s.attr("class"); if (clsValue) { s.attr("class", clsValue.replace("placeholderfriend", "")); } } } //判斷是否支持placeholder
  function isPlaceholer() { var input = document.createElement('input'); return "placeholder" in input; } //不支持的代碼
  if (!isPlaceholer()) { $(function() { var form = $(this); var elements = form.find("input[type='text'][placeholder]"); elements.each(function() { var s = $(this); var pValue = s.attr("placeholder"); var sValue = s.val(); if (pValue) { if (sValue == '') { s.val(pValue); } } }); elements.focus(function() { var s = $(this); var pValue = s.attr("placeholder"); var sValue = s.val(); if (sValue && pValue) { if (sValue == pValue) { s.val(''); } } }); elements.blur(function() { var s = $(this); var pValue = s.attr("placeholder"); var sValue = s.val(); if (!sValue) { s.val(pValue); } }); var elementsPass = form.find("input[type='password'][placeholder]"); elementsPass.each(function(i) { var s = $(this); var pValue = s.attr("placeholder"); var sValue = s.val(); if (pValue) { if (sValue == '') { var html = this.outerHTML || ""; html = html.replace(/\s*type=(['"])?password\1/gi, " type=text placeholderfriend").replace(/\s*(?:value|on[a-z]+|name)(=(['"])?\S*\1)?/gi, " ").replace(/\s*placeholderfriend/, " placeholderfriend value='" + pValue + "' " + "onfocus='placeholderfriendfocus(this);' "); var idValue = s.attr("id"); if (idValue) { s.attr("id", idValue + "placeholderfriend"); } var clsValue = s.attr("class"); if (clsValue) { s.attr("class", clsValue + "placeholderfriend"); } s.hide(); s.after(html); } } }); elementsPass.blur(function() { var s = $(this); var sValue = s.val(); if (sValue == '') { var idValue = s.attr("id"); if (idValue) { s.attr("id", idValue + "placeholderfriend"); } var clsValue = s.attr("class"); if (clsValue) { s.attr("class", clsValue + "placeholderfriend"); } s.hide().next().show(); } }); }); } window.placeholderfriendfocus = placeholderfriend.focus; })(jQuery);

 2在html文件中直接引用該文件路徑便可

<script src="Content/jquery/dist/placeholderfriend.js"></script>

3 在IE10 如下實現效果