获取DropDownList选择项的值

 1 <script type="text/javascript" language="javascript"> 
 2           function CheckDropDownList() { 
 3               var dropDownList = document.getElementById("<%=DropDownListID.ClientID %>"); //获取DropDownList控件 
 4               var dropDownListValue = dropDownList.options[dropDownList.selectedIndex].value; //获取选择项的值 
 5               //注：DropDownListID是DropDownList控件的ID。 
 6    
 7               //JS验证是否有非0值： 
 8               if (dropDownListValue == 0) { 
 9                   alert("请选择……."); 
10                  dropDownList.focus(); 
11                  return false; 
12              } 
13              else { 
14                  return true; 
15              } 
16          } 
17      </script>

 

function enble() {
            var ddl = document.getElementById("<%=ddl_YesNo_State.ClientID %>");
            var txt = document.getElementById("<%=btn_SaveALL.ClientID %>");
            var ddlValue = ddl.options[ddl.selectedIndex].value;
            if (ddlValue.toString() == "已发放") {
                txt.disabled = true;
            }
            else {
                txt.disabled = false;
            }
        }

转载于:https://www.cnblogs.com/tangge/archive/2012/05/28/2521515.html