function CheckDateTime(str){ 
var reg = /^(\d+)-(\d{1,2})-(\d{1,2}) (\d{1,2}):(\d{1,2}):(\d{1,2})$/; 
var r = str.match(reg); 
if(r==null)return false; 
r[2]=r[2]-1; 
var d= new Date(r[1], r[2],r[3], r[4],r[5], r[6]); 
if(d.getFullYear()!=r[1])return false; 
if(d.getMonth()!=r[2])return false; 
if(d.getDate()!=r[3])return false; 
if(d.getHours()!=r[4])return false; 
if(d.getMinutes()!=r[5])return false; 
if(d.getSeconds()!=r[6])return false; 
return true; 
}

function IsAlpha(cCheck)  //检查是否是英文26个字母
{
  return ((('a'<=cCheck) && (cCheck<='z')) || (('A'<=cCheck) && (cCheck<='Z')))
}


function isnumber(str)  //检查字符串是否为0-9的字符
{
  var digits="1234567890";
  var i=0;
  var strlen=str.length;
  while((i<strlen))
  {
    var char=str.charAt(i);
    if(digits.indexOf(char)==-1)return false;i++;
  }
  return true;
}  

function Verifyname(str)   //检查字符串是否为26个英文字母，0-9的数字，以及-_
{
  for (nIndex=0; nIndex<str.length; nIndex++)
  {
    cCheck = str.charAt(nIndex);
    if (!(isnumber(cCheck) || IsAlpha(cCheck) || cCheck=='-' || cCheck=='_' || cCheck=='.' ))
    {
      return false;
    }
  }
  return true;					
}  

function isEmpty(s)  //检查是否为空
{  
  return ((s == null) || (s.length == 0))
}

function isWhitespace (s)  //检查是否有空格
{  
  var whitespace = " \t\n\r";
  var i;
  for (i = 0; i < s.length; i++)
  {   
    var c = s.charAt(i);
    if (whitespace.indexOf(c) >= 0) 
    {
      return true;
    }
  }
  return false;
}

function isCharsInBag (s, bag)
{  
  var i;
  for (i = 0; i < s.length; i++)
  {   
    var c = s.charAt(i);
    if (bag.indexOf(c) == -1) return false;
    }
  return true;
}


function isEmail (s)  //判断是否是正确的EMAIL格式
{
  if (isEmpty(s))
  {
    window.alert("请输入E-mail地址！");	
    return false;
  }
  if (isWhitespace(s))
  {
    window.alert("输入的E-mail地址中不能包含空格符，请重新输入！");	
    return false;
  }
  var i = 1;
  var len = s.length;

  if (len > 50)
  {
    window.alert("email地址长度不能超过50位！");
    return false;
  }
	
  pos1 = s.indexOf("@");
  pos2 = s.indexOf(".");
  pos3 = s.lastIndexOf("@");
  pos4 = s.lastIndexOf(".");
  if ((pos1 <= 0)||(pos1 == len)||(pos2 <= 0)||(pos2 == len))  
  {
    window.alert("请输入有效的E-mail地址");
    return false;
  }
  else
  {
    if( (pos1 == pos2 - 1) || (pos1 == pos2 + 1) || ( pos1 != pos3 )|| ( pos4 < pos3 ) ) 		
      {
        window.alert("请输入有效的E-mail地址");
        return false;
      }
  }

  if ( !isCharsInBag( s, "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789.-_@"))
  {
    window.alert("email地址中只能包含字符ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789.-_@\n" + "请重新输入" );
    return false;
  }
  return true;
}

function Verifyhanzi(str)  //判断是不是汉字
{
  for (nIndex=0; nIndex<str.length; nIndex++)
  {
    cCheck = str.charAt(nIndex);
    if (isnumber(cCheck)|| IsAlpha(cCheck) || cCheck=='-' || cCheck=='_'|| cCheck==' '|| cCheck=='#'|| cCheck=='*'|| cCheck=='('|| cCheck==')'|| cCheck=='.'|| cCheck==';')
    {
      return false;
    }
  }
  return true;					
}

function Verifydate(str)  //判断是不是日期
{
  for (nIndex=0; nIndex<str.length; nIndex++)
  {
    cCheck = str.charAt(nIndex);
    if (isnumber(cCheck)|| cCheck=='-')
    {
      return false;
    }
  }
  return true;					
}

function Verifyzifu(str)  //判断是不是汉字
{
  for (nIndex=0; nIndex<str.length; nIndex++)
  {
    cCheck = str.charAt(nIndex);
    if (isnumber(cCheck)|| isAlpha(cCheck) || cCheck=='-' || cCheck=='_'|| cCheck=='#'|| cCheck=='*'|| cCheck=='('|| cCheck==')'|| cCheck=='.'|| cCheck==';')
    {
      return false;
    }
  }
  return true;					
}

function VerifyTel(str)
{
  for (nIndex=0; nIndex<str.length; nIndex++)
  {
    cCheck = str.charAt(nIndex);
    if (!(isnumber(cCheck) || cCheck=='-'|| cCheck=='('|| cCheck==')'|| cCheck==','))
    {
      return false;
    }
  }
  return true;					
}

function nospacelong(s) 
{
  var whitespace = " \t\n\r";
  var i,l;
  l=0;
  for (i = 0; i < s.length; i++)
  {   
    var c = s.charAt(i);
    if (whitespace.indexOf(c) < 0) 
    {
      l=l+1;
    }
  }
  return(l);
}