JS通用方法总结（一）

/**
 * id数组转换为json字符串
 */
function arrayTojson(arr) {
    var jsonIds = "[";
    for ( var i = 0; i < arr.length; i++) {
        if (i == arr.length - 1) {
            jsonIds += arr[i].eventid;
        } else {
            jsonIds += arr[i].eventid + ",";
        }
    }
    return jsonIds += "]";
}

/**
 * 获取系统的url
 * @returns fullUrl：系统访问路径，例如：http://localhost:8080/amudraya/amudraya
 */
function getURL(){
    var fullUrl = window.location.href;
    var a=fullUrl.lastIndexOf('/');
    fullUrl=fullUrl.substring(0,a);
    var b=fullUrl.lastIndexOf('/');
    fullUrl=fullUrl.substring(0,b);
    var c=fullUrl.lastIndexOf('/');
    fullUrl=fullUrl.substring(0,c);
    return fullUrl;
}

Js验证码

/**========================验证码开始=============**/
var code ; //在全局 定义验证码      
function createCode(){       
    code = "";      
    var codeLength = 4;//验证码的长度      
    var checkCode = document.getElementById("checkCode");      
    checkCode.value = "";      
    var selectChar = new Array(1,2,3,4,5,6,7,8,9,
            'a','b','c','d','e','f','g','h','j','k','l','m','n','p','q',
            'r','s','t','u','v','w','x','y','z','A','B','C','D','E','F',
            'G','H','J','K','L','M','N','P','Q','R','S','T','U','V','W','X','Y','Z');      
      
    for(var i=0;i<codeLength;i++) {      
        var charIndex = Math.floor(Math.random()*60);      
        code +=selectChar[charIndex];      
    }      
    if(code.length != codeLength){      
      createCode();      
    }      
    checkCode.value = code;      
}      
function validate () {      
    var inputCode = document.getElementById("loginCodeId").value.toUpperCase();      
    var codeToUp=code.toUpperCase();  
    if(inputCode.length <=0) {      
      alert("请输入验证码！");      
      return false;      
    }      
    else if(inputCode != codeToUp ){      
       alert("验证码输入错误！");      
       createCode();      
       return false;      
    }      
    else {      
      return true;      
    }      
}
/**======================验证码结束==================**/
/**
 * 关闭忘记密码页面
 */
function closeWindow(){
    $win.window('close');
}