js处理select操作总结

1.网址：
http://www.cnblogs.com/Herist/archive/2007/09/24/903890.html
http://www.cnblogs.com/xiangpiaopiao2011/archive/2011/06/15/2081580.html
2.代码总结
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>第一个简单的jQuery程序</title>
    <script language="javascript" type="text/javascript" 
            src="Jscript/jquery-1.4.2.min.js"></script>
    <script type="text/javascript">   
 
          var selectIndex='1'; 
    			/*获取选择的value*/    
          function clickSelect(){
          	selectIndex="1";
          	var obj = document.getElementById("select");
						selectIndex = obj.selectedIndex;
          }
          function changeSelect(){
           var selectVal = $("#select").val();                                 //获取选中记录的value值 
					 var selectText = $("#select option:selected").text();         //获取选中记录的text值
					// alert(selectVal +":"+selectText);
					 
					 //ajax
					 if(selectVal=='2'){//如果是2 需要提醒
					 	var r=confirm("danger是否确认选择?");
					  if (r==true)
				    {
				    	alert("更新成功");
				    }else{
				    	var obj = document.getElementById("select");
							obj.options[selectIndex].selected = true;  //保持选中状态
				    }
					 }else{
					 	
					 }
					}
  
    </script>
</head>
<body>
<select  id="select" onclick="clickSelect()" onchange="changeSelect()">
<option value="1">一</option>
<option value="2">二</option>
<option value="3">三</option>
<option value="4">四</option>
<option value="5">五</option>
<option value="6">六</option>
<option value="7">七</option>
<option value="8">八</option>
<option value="9">九</option>
</select>
</body>
</html>