经常使用的js小方法

<%@taglib prefix=”c” uri=”http://java.sun.com/jsp/jstl/core”%>

<%
String path = request.getContextPath();
String basePath = request.getScheme()+”://”+request.getServerName()+”:”+request.getServerPort()+path+”/”;
%>
”>
//回车登录

         document.onkeydown = function(e){ 
             var ev = document.all ? window.event : e; 
             if(ev.keyCode==13) { 
                 login();
             }
         };

/**
* 重置
*/

         function reset(){
             $('#loginName').val('');
             $('#passwd').val('');
         }

/**
* 去掉前后空格
*/

    function trim(str) {  
        var tarStr = str.replace(/^s*|s*$/g, "");  
        return tarStr;  
    }

/**
*登录
*/

function login(){
var userId = trim($('#userId').val());
var captchaId = trim($('#captchaId').val());
 var passwordId1 = trim($('#passwordId').val());
var passwordId=$.md5(decodeURI($('#passwordId').val()));
if(userId ==""){
$("#errMsgId").text("username必填");
return;
}
if(passwordId1 ==""){
$("#errMsgId").text("密码必填");
return;
}
if(passwordId1 != "" && passwordId1.length<6){
$("#errMsgId").text("密码长度少于6位");
return;
}

if(captchaId ==""){
$("#errMsgId").text("验证码必填");
return;
}
$.ajax({
type : "GET",
            url : "corpManager/loginSys.action?captcha="+captchaId+'&passWord='+passwordId+'&userAccount='+userId+"&d="+Math.random(),
           contentType : "application/json", 
            success : function(data) {
                if(data == '0') {
                $("#errMsgId").text("验证码错误");
                }else if(data == '1'){
                location.href="redirect/toCorp.action?d="+Math.random();;
                }else if(data == '2'){
                $("#errMsgId").text("username或密码错误");
                }else{
                $("#errMsgId").text(data);
                }    
            },
            error:function(XMLHttpRequest, textStatus, errorThrow){
            ajaxException(XMLHttpRequest);
            }
});
}