js怎么能取得多选下拉框选中的多个值?
方法:获取多选下拉框对象数组→循环判断option选项的selected属性(true为选中,false为未选中)→使用value属性取出选中项的值。实例演示如下:
1、HTML结构
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< select id = "test" multiple = "true" > < option value = "option-A" >option-A</ option > < option value = "option-B" >option-B</ option > < option value = "option-C" >option-C</ option > < option value = "option-D" >option-D</ option > </ select > < input type = "button" value = "确定" onclick = "fun()" /> |
2、javascript代码
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function fun(){ var select = document.getElementById( "test" ); var str = []; for (i=0;i<select.length;i++){ if (select.options[i].selected){ str.push(select[i].value); } } alert(str); } |
3、效果演示
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