【JS】IE相容placeholder

標籤：nts   ie相容   creat   class   his   default   length   var   style   

直接上代碼：

   $(document).ready(function () {        var doc = document,                textareas = doc.getElementsByTagName(‘textarea‘),                supportPlaceholder = ‘placeholder‘ in doc.createElement(‘textarea‘),                placeholder = function (textarea) {                    var text = textarea.getAttribute(‘placeholder‘),                            defaultValue = textarea.defaultValue;                    if (defaultValue == ‘‘) {                        textarea.value = text                    }                    textarea.onfocus = function () {                        if (textarea.value === text) {                            this.value = ‘‘                        }                    };                    textarea.onblur = function () {                        if (textarea.value === ‘‘) {                            this.value = text                        }                    }                };        if (!supportPlaceholder) {            for (var i = 0, len = textareas.length; i < len; i++) {                var textarea = textareas[i],                        text = textarea.getAttribute(‘placeholder‘);                if ( text) {                    placeholder(textarea);                }            }        }    });

textarea可以換成input

【JS】IE相容placeholder