[转] 添加option和删除option(兼容IE6、IE7、Firefox2.0)
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function AddItem( objSelectNow, val, txt ) {
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var objOption = document.createElement("OPTION");
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objOption.text = txt;
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objOption.value = val;
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objSelectNow.options.add(objOption);
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}
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function delseloptions() {
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var obj = document.getElementById('mainbusinessindustry').options;
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if( obj.length == 0 ) {
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alert( '没有可删除选项。' );
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return;
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}
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alert( obj[i] );
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for( var i = 0; i < obj.length; i++ ) {
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if( obj[i].selected ) {
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document.getElementById('mainbusinessindustry').remove(i);
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}
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}
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}
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