• IE6 7 select option设置disabled无效


    系统单据的一个分类需要禁用(不是删除),做单据的表单是用的下拉列表,马上就想到了 把那个option disabled.

       1:  function diableSelectItem(id,v){
       2:           var el = document.getElementById(id);
       3:           for(var i=0,j = el.options.length;i<j;i++){
       4:               if(el.options[i].value == v){ el.options[i].disabled=true;break;}
       5:           }
       6:   }

    OK,运行,发现选项没有显示灰色,仍然可用。!!!代码没问题啊,怎么办? 突发奇想 拿个IE8来试试,竟然禁用了。NND 是IE的问题
    怎么办,有问题,找google 发现 Select, Option, Disabled And The JavaScript Solution
    有老外已经搞定了。贴代码:

       1:  /****************************************************************
       2:  * Author:    Alistair Lattimore
       3:  * Website:    http://www.lattimore.id.au/
       4:  * Contact:    http://www.lattimore.id.au/contact/
       5:  *            Errors, suggestions or comments
       6:  * Date:        30 June 2005
       7:  * Version:    1.0
       8:  * Purpose:    Emulate the disabled attributte for the <option> 
       9:  *            element in Internet Explorer.
      10:  * Use:        You are free to use this script in non-commercial
      11:  *            applications. You are however required to leave
      12:  *            this comment at the top of this file.
      13:  *
      14:  *            I'd love an email if you find a use for it on your 
      15:  *            site, though not required.
      16:  ****************************************************************/
      17:   
      18:  window.onload = function() {
      19:      if (document.getElementsByTagName) {
      20:          var s = document.getElementsByTagName("select");
      21:   
      22:          if (s.length > 0) {
      23:              window.select_current = new Array();
      24:   
      25:              for (var i=0, select; select = s[i]; i++) {
      26:                  select.onfocus = function(){ window.select_current[this.id] = this.selectedIndex; }
      27:                  select.onchange = function(){ restore(this); }
      28:                  emulate(select);
      29:              }
      30:          }
      31:      }
      32:  }
      33:   
      34:  function restore(e) {
      35:      if (e.options[e.selectedIndex].disabled) {
      36:          e.selectedIndex = window.select_current[e.id];
      37:      }
      38:  }
      39:   
      40:  function emulate(e) {
      41:      for (var i=0, option; option = e.options[i]; i++) {
      42:          if (option.disabled) {
      43:              option.style.color = "graytext";
      44:          }
      45:          else {
      46:              option.style.color = "menutext";
      47:          }
      48:      }
      49:  }

    模拟了disabled的效果,改变文本颜色,当一个选项有 disabled属性,就让select元素选择索引回滚默认值

    另附上判断IE版本的js代码 来自 司徒正美

       1:  var ie = (function() {
       2:            var v = 3, div = document.createElement('div'), a = div.all || [];
       3:            while (div.innerHTML = '<!--[if gt IE '+(++v)+']><br><![endif]-->', a[0]);
       4:            return v > 4 ? v : !v;
       5:          }());
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  • 原文地址:https://www.cnblogs.com/iImax/p/2001228.html
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