常用的JS庫函數

來源http://www.dotblogs.com.tw/newmonkey48/archive/2009/11/22/12104.aspx
JS代碼網站http://www.cftea.com/c/2006/08/1F94458YM61AMFVD.asp
// JScript File//******************加強javascript功能*****//String.prototype.Trim = function() { return this.replace(/(^\s*)|(\s*$)/g, ""); }  String.prototype.LTrim = function() { return this.replace(/(^\s*)/g, ""); }  String.prototype.RTrim = function() { return this.replace(/(\s*$)/g, ""); } //******************驗證*******************////檢測中英文夾雜字串實際長度function CheckLen(ControlID,Length,FieldDesc,blnRequest){var control = GetControl(ControlID);    var value = GetControlValue(ControlID);    var strAlert = "";    if(blnRequest==true){    strAlert = CheckControl("Request",ControlID,FieldDesc);if(strAlert != "")return strAlert;}else if(value=="") return "";    if( blen(value) > Length )    {        return FieldDesc+" 欄位中文字不可超過"+(Length/2)+"個字或英文字不可超過"+Length+"個字!\r\n";    }    return "";}//檢測中英文夾雜字串實際長度function blen(str)              {    //參考網址    //http://www.360doc.com/content/081222/15/16915_2177384.html    var len = str.match(/[^ -~]/g) == null ? str.length : str.length + str.match(/[^ -~]/g).length ;    return len;}//判斷起始時間是否大於結束時間function CheckDateRange (BegDateID,EndDateID,FieldDesc,blnRequest){    var objBegDate;    var objEndDate;var valueBegDate,valueEndDate;    objBegDate = GetControl(BegDateID);    objEndDate = GetControl(EndDateID);valueBegDate = GetControlValue(BegDateID);valueEndDate = GetControlValue(EndDateID);    dtBegDate = Date.parse(objBegDate.value);    dtEndDate = Date.parse(objEndDate.value);if(blnRequest==true){strAlert = CheckControl("Request",BegDateID,FieldDesc+"開始日期");if(strAlert != "")return strAlert;strAlert = CheckControl("Request",EndDateID,FieldDesc+"結束日期");if(strAlert != "")return strAlert;}else if(valueBegDate=="" || valueEndDate) return "";    if(dtBegDate > dtEndDate)    {         return "日期較大的, 不能放在前面 !\r\n";    }    return "";}//判斷是否為日期格式function CheckDate(ControlID,FieldDesc,blnRequest) {var control = GetControl(ControlID);    var value = GetControlValue(ControlID);if(blnRequest==true){strAlert = CheckControl("Request",ControlID,FieldDesc);if(strAlert != "")return strAlert;}else if(value=="") return "";  //規則 yyyy/mm/dd  var obj,strValue,flag=false;  strValue = GetControlValue(ControlID);  if(strValue == "" )      return "";  var objRegExp  = /^\d{4}\/\d{1,2}\/\d{1,2}$/;   //check to see if in correct format  if(!objRegExp.test(strValue))  {    return FieldDesc+" 欄位必須為西元日期格式 ! (yyyy/mm/dd)\r\n";//doesn't match pattern, bad date  }  else{    var strSeparator = '/';     var arrayDate = strValue.split(strSeparator);     //create a lookup for months not equal to Feb.    var arrayLookup = { '01' : 31,'03' : 31,                         '04' : 30,'05' : 31,                        '06' : 30,'07' : 31,                        '08' : 31,'09' : 30,                        '10' : 31,'11' : 30,'12' : 31}    var intDay = parseInt(arrayDate[2],10);     //check if month value and day value agree    if(arrayLookup[arrayDate[1]] != null) {      if(intDay <= arrayLookup[arrayDate[1]] && intDay != 0)        flag= true; //found in lookup table, good date    }        //check for February (bugfix 20050322)    //bugfix  for parseInt kevin    //bugfix  biss year  O.Jp Voutat    var intMonth = parseInt(arrayDate[1],10);    if (intMonth == 2) {        var intYear = parseInt(arrayDate[0]);       if (intDay > 0 && intDay < 29) {           flag= true;       }       else if (intDay == 29) {         if ((intYear % 4 == 0) && (intYear % 100 != 0) ||              (intYear % 400 == 0)) {              // year div by 4 and ((not div by 100) or div by 400) ->ok             flag= true;         }          }    }  }      if(flag==false)  {      return FieldDesc+" 欄位日期資料有誤 !\r\n";  }  return ""; }//判斷是否為數字格式function CheckNumber(ControlID,FieldDesc,blnRequest){var control = GetControl(ControlID);    var value = GetControlValue(ControlID);if(blnRequest==true){strAlert = CheckControl("Request",ControlID,FieldDesc);if(strAlert != "")return strAlert;}else if(value=="") return "";    if(IsNumber(value)==false)    {        return FieldDesc+" 欄位必須為數字 !\r\n";    }    return "";}//判斷是否為整數格式function CheckInteger(ControlID,FieldDesc,blnRequest){var control = GetControl(ControlID);    var value = GetControlValue(ControlID);if(blnRequest==true){strAlert = CheckControl("Request",ControlID,FieldDesc);if(strAlert != "")return strAlert;}else if(value=="") return "";    if(IsInteger(value)==false)    {        return FieldDesc +" 欄位必須為整數 ！\r\n";    }    return "";        }//判斷是否為Email格式function CheckEmail(ControlID,FieldDesc,blnRequest){   var control = GetControl(ControlID);    var value = GetControlValue(ControlID);if(blnRequest==true){strAlert = CheckControl("Request",ControlID,FieldDesc);if(strAlert != "")return strAlert;}else if(value=="") return "";    if(IsEmail(value)==false)    {        return FieldDesc +" 欄位必須為E-mail！\r\n";    }    return ""; }//判斷是否為身份證字號格式function CheckIdNumber(ControlID,FieldDesc,blnRequest){var control = GetControl(ControlID);    var value = GetControlValue(ControlID);if(blnRequest==true){strAlert = CheckControl("Request",ControlID,FieldDesc);if(strAlert != "")return strAlert;}else if(value=="") return "";    if(IsIdNumber(value)==false)    {        return FieldDesc +" 欄位必須為身份證字號格式！\r\n";    }    return ""; }//確認是否輸入資料function CheckRequest(ControlID,FieldDesc){    var control =GetControl(ControlID);var value = GetControlValue(ControlID);var tagName = control.tagName.toLowerCase();if(tagName=="select"){if(control.options[control.selectedIndex].value==""){return "請選擇"+FieldDesc+"\r\n";    }else return "";}else if(tagName=="input"){var type = control.typeswitch(type){case "text":if(IsEmpty(value)){return "請輸入"+FieldDesc+"\r\n";    }break;case "checkbox":    break;case "radio":break;}}return "";}//*******************************共用方法***********************************////取得控制項function GetControlValue(ControlID){    var control;var value;     control = GetControl(ControlID);        value = control.value;return value}//取得控制項的值function GetControl(ControlID){    return document.getElementById(ControlID);  }//強化版測試Functionfunction CheckControl(type,ControlID,FieldDesc,blnRequest){switch(type){    case "Date":    return CheckDate(ControlID,FieldDesc,blnRequest) ;break;case "Number":return CheckNumber(ControlID,FieldDesc,blnRequest);break;case "Integer":return CheckInteger(ControlID,FieldDesc,blnRequest);break;case "Email":return CheckEmail(ControlID,FieldDesc,blnRequest);break;case "IdNumber":return CheckIdNumber(ControlID,FieldDesc,blnRequest);break;case "Request":return CheckRequest(ControlID,FieldDesc,blnRequest);break;}}//控制項焦點設定function ControlFocus(ControlID){var control = GetControl(ControlID);control.focus();}//*******************************基本判斷Function***************************////判斷是否為數字function IsNumber(value){    if(isNaN(value))        return false;    return true;}//判斷是否為整數function IsInteger(value){    var objRegExp  = /^-?\d+$/;     if(!objRegExp.test(value))        return false;    return true;}//判斷控制項必須要有值function IsEmpty(value){    if(value.Trim()=="")    return true;else     return false;    }//判斷是否為E-mailfunction IsEmail(value){       var objRegExp  = /^.+@.+\..+$/;     if(!objRegExp.test(value))        return false;    return true;}//判斷是否為身份證字號function IsIdNumber(value){    // 依照字母的編號排列，存入陣列備用。    var letters = new Array('A', 'B', 'C', 'D',        'E', 'F', 'G', 'H', 'J', 'K', 'L', 'M',        'N', 'P', 'Q', 'R', 'S', 'T', 'U', 'V',        'X', 'Y', 'W', 'Z', 'I', 'O');    // 儲存各個乘數    var multiply = new Array(1, 9, 8, 7, 6, 5,                           4, 3, 2, 1);    var nums = new Array(2);    var firstChar;    var firstNum;    var lastNum;    var total = 0;    // 撰寫「正規表達式」。第一個字為英文字母，    // 第二個字為1或2，後面跟著8個數字，不分大小寫。    var regExpID=/^[a-z](1|2)\d{8}$/i;    // 使用「正規表達式」檢驗格式    if (value.search(regExpID)==-1) {        // 基本格式錯誤        return false;    } else {    // 取出第一個字元和最後一個數字。    firstChar = value.charAt(0).toUpperCase();    lastNum = value.charAt(9);    }    // 找出第一個字母對應的數字，並轉換成兩位數數字。    for (var i=0; i<26; i++) {    if (firstChar == letters[i]) {        firstNum = i + 10;        nums[0] = Math.floor(firstNum / 10);        nums[1] = firstNum - (nums[0] * 10);        break;    }    }    // 執行加總計算    for(var i=0; i<multiply.length; i++){        if (i<2) {            total += nums[i] * multiply[i];        } else {            total += parseInt(value.charAt(i-1)) *                multiply[i];        }    }    // 和最後一個數字比對    if ((10 - (total % 10))!= lastNum) {    return false;    }    return true;}