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[ 2007-8-6 17:03:00 | By: ibrahim ]
 
javascript²Ù×÷Select±ê¼ÇÖÐoptions¼¯ºÏ

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options.add(option)·½·¨Ïò¼¯ºÏÀïÌí¼ÓÒ»Ïîoption¶ÔÏó£»
options.remove(index)·½·¨ÒƳýoptions¼¯ºÏÖеÄÖ¸¶¨Ï
options(index)»òoptions.item(index)¿ÉÒÔͨ¹ýË÷Òý»ñÈ¡options¼¯ºÏµÄÖ¸¶¨Ï
javascript´úÂëÈçÏ£º
var selectTag = null; //select±ê¼Ç
    var OPTONLENGTH = 10; //ÿ´ÎÌî³äoptionÊý
    var colls = [];       //¶Ôselect±ê¼ÇoptionsµÄÒýÓÃ
    window.onload = function(){
        selectTag = document.getElementById("SelectBox"); //»ñÈ¡select±ê¼Ç        
        colls = selectTag.options; //»ñÈ¡ÒýÓÃ
        //initSelectBox();    //×Ô³õʼ»¯select.options
    };
    
    //ʹÓÃËæ»úÊýÌî³äselect.options
    function initSelectBox(){
        var random = 0 ;
        var optionItem = null;
        var item = null;
        
        if(colls.length > 0 && isClearOption()){
             clearOptions(colls);
        }
        for(var i=0;i<OPTONLENGTH;i++){
             
    &nb


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