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var currItem = listbox.options[currIndex];
var prevItem = listbox.options[currIndex - 1];
//alert(currItem);
alert(prevItem.text);
listbox.options[currIndex - 1].text = currItem.text;
listbox.options[currIndex - 1].value = currItem.value;
alert(prevItem.text); //Á½´ÎalertÖµÊDz»Í¬µÄ
listbox.options[currIndex].text = prevItem.text;
listbox.options[currIndex].value = prevItem.value;
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String.prototype.Trim=function(){
returnthis.replace(/(^\s*)|(\s*$)/g,"");
}
String.prototype.LTrim=function(){
returnthis.replace(/(^\s*)/g,"");
}
String.prototype.RTrim=function(){
returnthis.replace(/(\s*$)/g,"");
} ......
<script type="text/javascript">
function dayChange(year,month,day){
var selectYear = document.getElementById(year);
var selectMonth = document.getElementById(month);
var selectDay = document.getElementById(day);
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