標籤：json placeholder
<head> <title> placeholder和json兩種實現登入隱藏的方法 </title> <script type="text/javascript"> //判斷瀏覽器是否支援 placeholder屬性 function isPlaceholder() { var input = document.createElement('input'); return 'placeholder' in input; } if (!isPlaceholder()) { //不支援placeholder 用jquery來完成 $(document).ready(function() { if (!isPlaceholder()) { $("input").not("input[type='password']").each( //把input綁定事件 排除password框 function() { if ($(this).val() == "" && $(this).attr("placeholder") != "") { $(this).val($(this).attr("placeholder")); $(this).focus(function() { if ($(this).val() == $(this).attr("placeholder")) $(this).val(""); }); $(this).blur(function() { if ($(this).val() == "") $(this).val($(this).attr("placeholder")); }); } }); //對password框的特殊處理1.建立一個text框 2擷取焦點和失去焦點的時候切換 var pwdField = $("input[type=password]"); var pwdVal = pwdField.attr('placeholder'); pwdField.after('<input class="password" id="pwdPlaceholder" type="text" value=' + pwdVal + ' autocomplete="off" />'); var pwdPlaceholder = $('#pwdPlaceholder'); pwdPlaceholder.show(); pwdField.hide(); pwdPlaceholder.focus(function() { pwdPlaceholder.hide(); pwdField.show(); pwdField.focus(); }); pwdField.blur(function() { if (pwdField.val() == '') { pwdPlaceholder.show(); pwdField.hide(); } }); } }); } </script></head><body> <input class="username" placeholder="使用者名稱" type="text" id="accountId" name="operId" maxlength="20" style="ime-mode:disabled;" /> </br> <input class="password" placeholder="密碼" type="password" id="pwdId" name="pwd" maxlength="20" style="ime-mode:disabled;" /></body>
placeholder和json兩種實現登入隱藏的方法,當瀏覽器不支援placeholder時，可以用json來實現登入使用者名稱密碼的隱藏
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