javascript for dropdown

问题描述

 function DiseaseChange（）{
  var  disease = document.getElementById（ <％= DDLDisease.ClientID％>）。selectedindex; 
  if （确认（ 你确定吗？你想改变疾病吗？）==  true ）{
 
} 
  else  {
 document.getElementById（ <％= DDLDisease.ClientID ％>）。selectedindex =疾病; 
  return   false ; 
} 

这是我为下拉列表写的javascript



当我点击取消警报时，疾病下拉的价值不应该改变......但这不是快乐..下拉的价值正在变化..请帮我解决这个问题..

解决方案

function DiseaseChange() {
           var disease = document.getElementById("<%=DDLDisease.ClientID %>").selectedindex;
           if (confirm("Are You sure yow want to change disease?") == true) {

           }
           else {
               document.getElementById("<%=DDLDisease.ClientID %>").selectedindex = disease;
               return false;
           }

this is the javascript i wrote for dropdownlist

when i am clicking on cancel of the alert the value of disease dropdown should not be change...but this is not happning..value of drop down is getting change..please help me out from this problem..

解决方案

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