1.动态创建select
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function createSelect(){
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var mySelect = document.createElement(“select”);
mySelect.id = “mySelect”;
document.body.appendChild(mySelect);
}
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2.添加选项option
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function addOption(){
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//根据id查找对象,
var obj=document.getElementById(‘mySelect’);
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//添加一个选项
obj.add(new Option(“文本”,”值”));
}
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3.删除所有选项option
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function removeAll(){
var obj=document.getElementById(‘mySelect’);
obj.options.length=0;
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}
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4.删除一个选项option
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function removeOne(){
var obj=document.getElementById(‘mySelect’);
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//index,要删除选项的序号,这里取当前选中选项的序号
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var index=obj.selectedIndex;
obj.options.remove(index);
}
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5.获得选项option的值
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var obj=document.getElementById(‘mySelect’);
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var index=obj.selectedIndex; //序号,取当前选中选项的序号
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var val = obj.options[index].value;
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6.获得选项option的文本
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var obj=document.getElementById(‘mySelect’);
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var index=obj.selectedIndex; //序号,取当前选中选项的序号
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var val = obj.options[index].text;
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7.修改选项option
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var obj=document.getElementById(‘mySelect’);
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var index=obj.selectedIndex; //序号,取当前选中选项的序号
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var val = obj.options[index]=new Option(“新文本”,”新值”);
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8.删除select
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function removeSelect(){
var mySelect = document.getElementById(“mySelect”);
mySelect.parentNode.removeChild(mySelect);
}
来源:CSDN
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