JS面向对象封装，判空判重

 1 //定义表单项类型
 2 FormItem=function(lable,id){
 3     this.lable=lable;
 4     this.id=id;
 5 }
 6 //工具类
 7 EGOV=function(){
 8     //验证非空
 9     this.isNotEmpty=function(formItemArr){
10         for(var i=0;i<formItemArr.length;i++){
11             var formItem=formItemArr[i];
12             var id=formItem.id;
13             var lable=formItem.lable;
14             var domObj=document.getElementById(id);
15             if(domObj.value == ""){
16                 alert(lable+"不能为空，请填写");
17                 domObj.focus();
18                 return false;
19                 
20             }
21         }
22         return true;
23     }
24     //验证一致性(程序运行的时候formItem1和fornItem2都是FormItem类型的对象)
25     this.isSame=function(formItem1,FormItem){
26           var id1=formItem1.id;
27           var lable1=formItem1.label;
28           var domobj1=document.getElementById(id1);
29           
30           var id2=formItem2.id;
31           var lable2=formItem2.label;
32           var domobj2=document.getElementById(id2);
33           
34           if(domobj1.value !=domobj2.value){
35               alert(lable1 + "和" +lable2 +"不一致，请重新填写");
36               domobj1.value="";
37               domobj2.value="";
38               domobj1.focus();
39               return false;
40           }
41           return false;
42     }
43 }
44 
45 var $=new EGOV();

<script src="js/egov.js"></script>
<script>
function doUpdate(){
    var ok=validataForm();
    if(ok){
        document.forms["userForm"].submit();
    }
}
function validataForm(){
    var formItem1=new FormItem("用户姓名","username");
    var formItem2=new FormItem("用户密码","userpswd");
    var formItem3=new FormItem("用户类型","orgtype");
    var formItemArr=[formItem1,formItem2,formItem3];
    
    return $.isNotEmpty(formItemArr);
}

</script>