Javascript²Ù×÷select¿Ø¼þ´óÈ«
	
    
    
	1ÅжÏselectÑ¡ÏîÖÐ ÊÇ·ñ´æÔÚValue="paraValue"µÄItem 
2ÏòselectÑ¡ÏîÖÐ ¼ÓÈëÒ»¸öItem 
3´ÓselectÑ¡ÏîÖРɾ³ýÒ»¸öItem 
4ɾ³ýselectÖÐÑ¡ÖеÄÏî 
5ÐÞ¸ÄselectÑ¡ÏîÖÐ value="paraValue"µÄtextΪ"paraText" 
6ÉèÖÃselectÖÐtext="paraText"µÄµÚÒ»¸öItemΪѡÖÐ 
7ÉèÖÃselectÖÐvalue="paraValue"µÄItemΪѡÖÐ 
8µÃµ½selectµÄµ±Ç°Ñ¡ÖÐÏîµÄvalue 
9µÃµ½selectµÄµ±Ç°Ñ¡ÖÐÏîµÄtext 
10µÃµ½selectµÄµ±Ç°Ñ¡ÖÐÏîµÄIndex 
11Çå¿ÕselectµÄÏî 
// 1.ÅжÏselectÑ¡ÏîÖÐ ÊÇ·ñ´æÔÚValue="paraValue"µÄItem        
function jsSelectIsExitItem(objSelect, objItemValue) {        
    var isExit = false;        
    for (var i = 0; i < objSelect.options.length; i++) {        
        if (objSelect.options.value == objItemValue) {        
            isExit = true;        
            break;        
        }        
    }        
    return isExit;        
}        
// 2.ÏòselectÑ¡ÏîÖÐ ¼ÓÈëÒ»¸öItem        
function jsAddItemToSelect(objSelect, objItemText, objItemValue) {        
    //ÅжÏÊÇ·ñ´æÔÚ        
    if (jsSelectIsExitItem(objSelect, objItemValue)) {        
        alert("¸ÃItemµÄValueÖµÒѾ´æÔÚ");        
    } else {  
    
     
	
	
    
    
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    <script type="text/javascript">
        var time = new Date("04/30/2010");
        document.write(time);
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    /**
 * ±í¸ñÅÅÐò(µ¥¸ö±í¸ñ£¬½µÐò)
 * @example
 * <code>
 * <table is_sort="1">
 * <tr>
 *   <th><a href="javascript:void(0)" mce_href="javascript:void(0)" onclick="table_sort(0, 0)">field1</a></th>
 *   <th><a href="javascript:void(0)" mce_href ......