Question

我试图根据选定的类别清单中选择的类别,将数值列入一个子类的选定清单。似乎还没有在IEE工作。谁能提出问题?

在S.C.R.C.R.C.R.C.R.C.R.R.C.R.R.R.,I.在I.R.C.R.C.R.C.R.C.R.C.R.R.C.R.R.R.R.R.R.R.R.R.,I.在I.R.C.R.R.C.R.R.R.R.中,I.在I.R.C.R.C.R.R.C.R.R.R.R.R.R.C.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.R.

<body onload="setSubcategories(default_value);">

在小标题档案中,我有类似的东西。

 subcategories = new Array();
 subcategories[ Lifestyle ] = [ All ,
                                   Beauty (SHC) ,
                                   Skin Care ,
                                   Hair Care ,
                                   Oral Care ,
                                   Cosmetics ,
                                   Footwear ,
                                   Jewelry ,
                                   Male Styling ,
                                   Women Hygiene ,
                                   Womens magazines ,
                                   Apparels ,
                                    Fashion (AFA) ,
                                   Spa ,
                                   Accessories 
                                  ];
    subcategories[ Automobiles ] = [ All ,
                            Automobiles (C&B) ,
                            Cars ,
                            Bikes ,
                            Car Magazine ,
                            Bikes Magazine ,
                            Accessories 
                       ];
    subcategories[ FoodandBeverage ] = [ All ,
                                   Snacking ,
                                   Confectionary ,
                                   Beverages ,
                                   Generic F&B ,
                                   Restaurant Review ,
                                   Food Reviews ,
                                   Wines & Vineyards 
                              ];


function setSubcategories(default_value){
    default_value = (typeof default_value ==  undefined ) ?
              All  : default_value;
    var elem = document.getElementById( id-category );
    if(elem == null){return false;}

    var category = elem.value;
    var subelem = document.getElementById( id-subcategory );
    var html = "";
    var subcategoriesArr = subcategories[category];
    for(var i=0; i < subcategoriesArr.length; i++){
        var selected = subcategoriesArr[i] == default_value ? " selected" : "";
        html +=  <option  + selected +  >  + subcategoriesArr[i] +  </option>
 ;
    }
    subelem.innerHTML = html;
}

Answer 1

采用相当于DOM当量的工艺:

var subcategoriesArr = subcategories[category];
for(var i=0; i < subcategoriesArr.length; i++){
    var option = document.createElement( option );
    option.value = option.text = subcategories[i];
    option.selected = (subcategoriesArr[i] == default_value);
    subelem.appendChild(option);
}

Answer 2

利用设定<代码>Option物体并添加到options/code>的按时间顺序排列的方法收集:



var subcategoriesArr = subcategories[category];
var i, len, selected, optionText;

// Clear any existing options
subelem.options.length = 0;

// Create new options
for (i = 0, len = subcategoriesArr.length; i < len; i++){
  selected = (subcategoriesArr[i] === default_value);
  optionText = subcategoriesArr[i];
  subelem.options[i] = new Option(optionText, optionText, selected, selected);
}

Answer 3

此前,我曾碰到了这一ug。您可在Internet Exploration上就选定要素设定inner Rainbow/code>。您必须总结一下四舍五入(或其它部分)的选定内容,然后为包括你希望插入的备选办法在内的新选定要素打上标记。



这里的缩略语:


Target the select
Wrap the select in a div element
Store the markup of the select for later reuse (step #5) and clear the contents of the div
Generate markup for options
Include that markup in the stored select markup
Put the whole thing inside the div surrounding the select


不用说:我最后采用纯粹的OM办法。 这是一种耻辱,因为它比使用<条码>内超文本<>/代码>要慢得多。

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