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Summary of common JS verification scripts_javascript skills

WBOY
Release: 2016-05-16 15:28:26
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本文实例讲述了常见JS验证脚本。分享给大家供大家参考,具体如下:

/*-------------- 函数检索 --------------
trim函数:             trim() lTrim() rTrim()
校验字符串是否为空:         checkIsNotEmpty(str)
校验字符串是否为整型:        checkIsInteger(str)
校验整型最小值:          checkIntegerMinValue(str,val)
校验整型最大值:          checkIntegerMaxValue(str,val) 
校验整型是否为非负数:        isNotNegativeInteger(str)
校验字符串是否为浮点型:       checkIsDouble(str) 
校验浮点型最小值:         checkDoubleMinValue(str,val)
校验浮点型最大值:         checkDoubleMaxValue(str,val)
校验浮点型是否为非负数:       isNotNegativeDouble(str)
校验字符串是否为日期型:       checkIsValidDate(str)
校验两个日期的先后:        checkDateEarlier(strStart,strEnd)
校验字符串是否为email型:      checkEmail(str)
校验字符串是否为中文:        checkIsChinese(str)
计算字符串的长度,一个汉字两个字符:  realLength()
校验字符串是否符合自定义正则表达式:  checkMask(str,pat)
得到文件的后缀名:          getFilePostfix(oFile) 
-------------- 函数检索 --------------
*/
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, "");
}
function checkIsNotEmpty(str)
{
  if(str.trim() == "")
    return false;
  else
    return true;
}//~~~
function checkIsInteger(str)
{
  //如果为空,则通过校验
  if(str == "")
    return true;
  if(/^(\\-?)(\\d+)$/.test(str))
    return true;
  else
    return false;
}//~~~
function checkIntegerMinValue(str,val)
{
  //如果为空,则通过校验
  if(str == "")
    return true;
  if(typeof(val) != "string")
    val = val + "";
  if(checkIsInteger(str) == true)
  {
    if(parseInt(str,10)>=parseInt(val,10))
      return true;
    else
      return false;
  }
  else
    return false;
}//~~~
function checkIntegerMaxValue(str,val)
{
  //如果为空,则通过校验
  if(str == "")
    return true;
  if(typeof(val) != "string")
    val = val + "";
  if(checkIsInteger(str) == true)
  {
    if(parseInt(str,10)<=parseInt(val,10))
      return true;
    else
      return false;
  }
  else
    return false;
}//~~~
function isNotNegativeInteger(str)
{
  //如果为空,则通过校验
  if(str == "")
    return true;
  if(checkIsInteger(str) == true)
  {
    if(parseInt(str,10) < 0)
      return false;
    else
      return true;
  }
  else
    return false;
}//~~~
function checkIsDouble(str)
{
  //如果为空,则通过校验
  if(str == "")
    return true;
  //如果是整数,则校验整数的有效性
  if(str.indexOf(".") == -1)
  {
    if(checkIsInteger(str) == true)
      return true;
    else
      return false;
  }
  else
  {
    if(/^(\\-&#63;)(\\d+)(.{1})(\\d+)$/g.test(str))
      return true;
    else
      return false;
  }
}//~~~
function checkDoubleMinValue(str,val)
{
  //如果为空,则通过校验
  if(str == "")
    return true;
  if(typeof(val) != "string")
    val = val + "";
  if(checkIsDouble(str) == true)
  {
    if(parseFloat(str)>=parseFloat(val))
      return true;
    else
      return false;
  }
  else
    return false;
}//~~~
function checkDoubleMaxValue(str,val)
{
  //如果为空,则通过校验
  if(str == "")
    return true;
  if(typeof(val) != "string")
    val = val + "";
  if(checkIsDouble(str) == true)
  {
    if(parseFloat(str)<=parseFloat(val))
      return true;
    else
      return false;
  }
  else
    return false;
}//~~~
function isNotNegativeDouble(str)
{
  //如果为空,则通过校验
  if(str == "")
    return true;
  if(checkIsDouble(str) == true)
  {
    if(parseFloat(str) < 0)
      return false;
    else
      return true;
  }
  else
    return false;
}//~~~
function checkIsValidDate(str)
{
  //如果为空,则通过校验
  if(str == "")
    return true;
  var pattern = /^((\\d{4})|(\\d{2}))-(\\d{1,2})-(\\d{1,2})$/g;
  if(!pattern.test(str))
    return false;
  var arrDate = str.split("-");
  if(parseInt(arrDate[0],10) < 100)
    arrDate[0] = 2000 + parseInt(arrDate[0],10) + "";
  var date = new Date(arrDate[0],(parseInt(arrDate[1],10) -1)+"",arrDate[2]);
  if(date.getYear() == arrDate[0]
    && date.getMonth() == (parseInt(arrDate[1],10) -1)+""
    && date.getDate() == arrDate[2])
    return true;
  else
    return false;
}//~~~
function checkDateEarlier(strStart,strEnd)
{
  if(checkIsValidDate(strStart) == false || checkIsValidDate(strEnd) == false)
    return false;
  //如果有一个输入为空,则通过检验
  if (( strStart == "" ) || ( strEnd == "" ))
    return true;
  var arr1 = strStart.split("-");
  var arr2 = strEnd.split("-");
  var date1 = new Date(arr1[0],parseInt(arr1[1].replace(/^0/,""),10) - 1,arr1[2]);
  var date2 = new Date(arr2[0],parseInt(arr2[1].replace(/^0/,""),10) - 1,arr2[2]);
  if(arr1[1].length == 1)
    arr1[1] = "0" + arr1[1];
  if(arr1[2].length == 1)
    arr1[2] = "0" + arr1[2];
  if(arr2[1].length == 1)
    arr2[1] = "0" + arr2[1];
  if(arr2[2].length == 1)
    arr2[2]="0" + arr2[2];
  var d1 = arr1[0] + arr1[1] + arr1[2];
  var d2 = arr2[0] + arr2[1] + arr2[2];
  if(parseInt(d1,10) > parseInt(d2,10))
    return false;
  else
    return true;
}//~~~
function checkEmail(str)
{
  //如果为空,则通过校验
  if(str == "")
    return true;
  if (str.charAt(0) == "." || str.charAt(0) == "@" || str.indexOf(\'@\', 0) == -1
    || str.indexOf(\'.\', 0) == -1 || str.lastIndexOf("@") == str.length-1 || str.lastIndexOf(".") == str.length-1)
    return false;
  else
    return true;
}//~~~
function checkIsChinese(str)
{
  //如果值为空,通过校验
  if (str == "")
    return true;
  var pattern = /^([\一-\龥]|[\︰-\&#63;&#63;])*$/gi;
  if (pattern.test(str))
    return true;
  else
    return false;
}//~~~
String.prototype.realLength = function()
{
 return this.replace(/[^\\x00-\\xff]/g,"**").length;
}
function checkMask(str,pat)
{
  //如果值为空,通过校验
  if (str == "")
    return true;
  var pattern = new RegExp(pat,"gi")
  if (pattern.test(str))
    return true;
  else
    return false;
}//~~~
function getFilePostfix(oFile)
{
  if(oFile == null)
    return null;
  var pattern = /(.*)\\.(.*)$/gi;
  if(typeof(oFile) == "object")
  {
    if(oFile.value == null || oFile.value == "")
      return null;
    var arr = pattern.exec(oFile.value);
    return RegExp.$2;
  }
  else if(typeof(oFile) == "string")
  {
    var arr = pattern.exec(oFile);
    return RegExp.$2;
  }
  else
    return null;
}

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希望本文所述对大家JavaScript程序设计有所帮助。

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