JavaScript控制兩個列表框listbox左右交換數據的方法

2024-05-06 16:17:08

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這篇文章主要介紹了JavaScript控制兩個列表框listbox左右交換數據的方法,實例分析了javascript操作列表框listbox的技巧,非常具有實用價值,需要的朋友可以參考下

本文實例講述了JavaScript控制兩個列表框listbox左右交換數據的方法。分享給大家供大家參考。具體分析如下：

這個功能我們經常用到，將左邊列表框的元素移動到右邊，或者將右邊列表框的元素移動到左邊，可以一次性全部移動

復制代碼代碼如下:

		function listbox_moveacross(sourceID, destID) {
		    var src = document.getElementById(sourceID);
		    var dest = document.getElementById(destID);
		    for(var count=0; count < src.options.length; count++) {
		        if(src.options[count].selected == true) {
		                var option = src.options[count];
		                var newOption = document.createElement("option");
		                newOption.value = option.value;
		                newOption.text = option.text;
		                newOption.selected = true;
		                try {
		                         dest.add(newOption, null); //Standard
		                         src.remove(count, null);
		                 }catch(error) {
		                         dest.add(newOption); // IE only
		                         src.remove(count);
		                 }
		                count--;
		        }
		    }
		}
		//..
		listbox_moveacross('countryList', 'selectedCountryList');

下面是像是的演示效果代碼，可以直接在瀏覽器內執行

復制代碼代碼如下:

		Click below buttons to move selected options right or left.<br>
		<table>
		<tbody><tr>
		    <td>
		<select id="sourceSelect" size="10" multiple="">
		 <option value="a">Afghanistan</option>
		 <option value="b">Bahamas</option>
		 <option value="c">Barbados</option>
		 <option value="d">Belgium</option>
		 <option value="e">Bhutan</option>
		 <option value="f">China</option>
		 <option value="g">Croatia</option>
		 <option value="h">Denmark</option>
		 <option value="i">France</option>
		</select>
		    </td>
		    <td>
		        <button onclick="listboxMoveacross('sourceSelect', 'destSelect');">>></button>  <br>
		        <button onclick="listboxMoveacross('destSelect', 'sourceSelect');"><<</button>
		    </td>
		    <td>
		<select id="destSelect" size="10" multiple="">
		 <option value="a">Afghanistan</option>
		 <option value="b">Bahamas</option>
		 <option value="c">Barbados</option>
		 <option value="d">Belgium</option>
		 <option value="e">Bhutan</option>
		 <option value="f">China</option>
		 <option value="g">Croatia</option>
		 <option value="h">Denmark</option>
		 <option value="i">France</option>
		</select>
		    </td>
		</tr>
		</tbody></table>
		    <script>
		function listboxMoveacross(sourceID, destID) {
		    var src = document.getElementById(sourceID);
		    var dest = document.getElementById(destID);
		    for(var count=0; count < src.options.length; count++) {
		        if(src.options[count].selected == true) {
		                var option = src.options[count];
		                var newOption = document.createElement("option");
		                newOption.value = option.value;
		                newOption.text = option.text;
		                newOption.selected = true;
		                try {
		                         dest.add(newOption, null); //Standard
		                         src.remove(count, null);
		                 }catch(error) {
		                         dest.add(newOption); // IE only
		                         src.remove(count);
		                 }
		                count--;
		        }
		    }
		}
		</script>