// *************************************************
// *             JS Form 验证函数                  *
// *                 公共函数                      ×
// *************************************************

//要验证的form变量
var validForm

//判断内容是否为空；为空返回true
function TextIsEmpty(fieldName)
{
  if (eval("validForm."+fieldName+".value")=="")
  { return true;}
  else
  { return false;}
}
function TrimSpace(itemName){
	var value = eval("validForm."+itemName+".value");
 	var validItemName = value;		
	for(var i=0;i<validItemName.length;i++){
		
		value = value.replace(" ","");
	}
	if(value==""){
		return true;
	}else{
		return false;
	} 			
}

//判断字段内容是否为合法的email地址；不合法返回true
function TextIsNotEmail(fieldName)
{
    val = eval("validForm."+fieldName+".value");
	longueur = val.length;
	pos = val.indexOf("@");
	pos2 = val.lastIndexOf(".");
	if (pos==-1 || pos2==-1 || pos2<pos || pos<1 || pos2-pos<2 || longueur-pos2<2)
	{ return true;}
	else
	{ return false;}
}
//判断字段内容是否为txt文件，是返回true
function TextIsTxtStyle(fieldName)
{   
    val = eval("validForm."+fieldName+".value");
    pos=val.lastIndexOf(".");
    if(val.substr(pos+1).toLowerCase()=="txt")
        {return true;}
    else
        {return false;} 
}  
//判断字段内容是否为zip文件，是返回true
function TextIsPhotoStyle(fieldName)
{   
    val = eval("validForm."+fieldName+".value");
    pos=val.lastIndexOf(".");
    if(val.substr(pos+1).toLowerCase()=="zip")
        {return true;}
    else
        {return false;} 
}  
//字段内容是否为十进制的数字；不是返回true
function TextIsNotDecimal(fieldName)
{
  if (TextIsEmpty(fieldName))
  { return true;}
  else
  {
    val = eval("validForm."+fieldName+".value");
    if (IsDecimal(val))
    { return false;}
    else
    { return true;}
  }
}
function IsNotDecimal(value)
{


    if (IsDecimal(value))
    { return false;}
    else
    { return true;}

}

//判断字段内容是否为整型数字；不是返回true
function TextIsNotNumeric(fieldName)
{
  if (TextIsEmpty(fieldName))
  { return true;}
  else
  {
    val = eval("validForm."+fieldName+".value");
    if (IsNumeric(val))
    { return false;}
    else
    { return true;}
  }
}

//判断字段内容是否全部为字符；不是返回true
function TextIsNotAlpha(fieldName)
{
  if (TextIsEmpty(fieldName))
  { return true;}
  else
  {
    val = eval("validForm."+fieldName+".value");
    if (IsAlpha(val))
    { return false;}
    else
    { return true;}
  }
}
function IsNotAlpha(fieldName)
{
  if (TextIsEmpty(fieldName))
  { return true;}
  else
  {
    val = eval("validForm."+fieldName+".value");
    if (IsAlpha(val))
    { return true;}
    else
    { return false;}
  }
}

//判断字段内容是否全部为数字；不是返回true
function TextIsNotNum(fieldName)
{
  if (TextIsEmpty(fieldName))
  { return true;}
  else
  {
    val = eval("validForm."+fieldName+".value");
    if (IsNum(val))
    { return false;}
    else
    { return true;}
  }
}
function IsNotAlphaNum(value)
{

    val = eval(value);
    if (IsAlphaNum(val))
    { return false;}
    else
    { return true;}

}

//判断字段内容是否全部为数字和字母；不是返回true
function TextIsNotAlphaNum(fieldName)
{
  if (TextIsEmpty(fieldName))
  { return true;}
  else
  {
    val = eval("validForm."+fieldName+".value");
    if (IsAlphaNum(val))
    { return false;}
    else
    { return true;}
  }
}

//判断字段内容是否为在minVal和maxVal之间的整型数字；不是返回true
function TextIsNotBetween(fieldName, minVal, maxVal)
{
  val = eval("validForm."+fieldName+".value");
  if (IsNumeric(val))
  {
    if (val>minVal && val<maxVal)
	{ return false;}
	else
	{ return true;}
  }
  else { return true;}
}

//判断两个字段值是否一样，不是或者为空返回true
function TextIsNotEquals(fieldName1, fieldName2)
{
  if (TextIsEmpty(fieldName1)||TextIsEmpty(fieldName2))
  { return true;}
  else
  {
    if (eval("validForm."+fieldName1+".value")!=eval("validForm."+fieldName2+".value"))
    { return true;}
    else
    { return false;}
  }
}

//判断多行选择框中是否有选择的项；没有返回true
function SelectIsEmpty(fieldName)
{
  if (eval("validForm."+fieldName+".selectedIndex")==-1)
  { return true;}
  else
  { return false;}
}

//判断是否为合法的日期；不是返回true
function SelectIsNotDate(fieldYear, fieldMonth, fieldDay)
{
  year = eval("validForm."+fieldYear+".value");
  month = eval("validForm."+fieldMonth+".value");
  day = eval("validForm."+fieldDay+".value");
  if (IsDateValide(year, month, day))
  { return false;}
  else
  { return true;}
}
function SelectIsNotDateZzk(fieldYear, fieldMonth, fieldDay)
{
  year = eval(fieldYear);
  month = eval(fieldMonth);
  day = eval(fieldDay);
  if (IsDateValide(year, month, day))
  { return false;}
  else
  { return true;}
}


//返回星期(0:sunday -> 6:saturday)
function GetDayOfWeek(fieldYear, fieldMonth, fieldDay)
{
  year = eval("validForm."+fieldYear+".value");
  month = eval("validForm."+fieldMonth+".value");
  day = eval("validForm."+fieldDay+".value");

  var myDate = new Date(year,month-1,day);
  return myDate.getDay();
}

//判断多选按钮是否有选择的项；没有返回true
function RadioIsNotChecked(fieldName)
{
  noncoche=true;
  nb=eval("validForm."+fieldName+".length");
    for (i=0; i<nb; i++)
    {
      if (eval("validForm."+fieldName+"["+i+"].checked")) noncoche=false;
    }
  return noncoche;
}

//返回一个选择序列中被选择项的个数
function BoxHowChecked(fieldName, totalNum)
{
  nb = 0;
  for (i=1; i<=totalNum; i++)
  {
    if (eval("validForm."+fieldName+i+".checked") == true)  nb=nb+1;
  }
  return nb;
}
//判断日期格式是否正确，正确则返回true
function DateStyle(fieldName){
		date = eval("validForm."+fieldName+".value");
			var date;
			var year;
			var month;
			var day;	
			var leng;
			var i;
			var num=0;
			var wordArray;
			var today=new Date();
			var nowyear=today.getFullYear();
			var nowmonth=today.getMonth()+1;
			var nowday=today.getDate();
			var strnowyear=new String(nowyear)
			var lastnowyear=strnowyear.substring(2,4);
			leng=date.length;


			if((leng>=6)&&(leng<=10)){
				for(i=0;i<leng;i++){
					if((date.charAt(i)=='/')||(date.charAt(i)=='-')||(date.charAt(i)=='.')){
						num=num+1;
						date=date.replace(date.charAt(i),',');
						wordArray=date.split(',');
					}
				}
				if(num==2){
					if(((wordArray[0].length==4)||(wordArray[0].length==2))&&((wordArray[1].length==2)||(wordArray[1].length==1))&&((wordArray[2].length==2)||(wordArray[2].length==1))){
						if(!isNaN(wordArray[0])&&!isNaN(wordArray[1])&&!isNaN(wordArray[2])){
				if(wordArray[0].length==2&&(wordArray[0]>lastnowyear))
				{wordArray[0]='19'+wordArray[0];}
				if(wordArray[0].length==2&&(wordArray[0]<=lastnowyear))
				{wordArray[0]='20'+wordArray[0];}							
							if(wordArray[0].length==4)
							{wordArray[0]=wordArray[0];}

							if(wordArray[1].length==1)
							{wordArray[1]='0'+wordArray[1];}
							if(wordArray[1].length==2)
							{wordArray[1]=wordArray[1];}

							if(wordArray[2].length==1)
							{wordArray[2]='0'+wordArray[2];}
							if(wordArray[2].length==2)
							{wordArray[2]=wordArray[2];}
				
							var strwordArray=wordArray.join();
							year=strwordArray.substring(0,4);
							month=strwordArray.substring(5,7);
							day=strwordArray.substring(8,10);
				
							if(!SelectIsNotDateZzk(year,month,day)){
								var inputdate;
								var nowdate;
								var timedif;
								inputdate=new Date(year,month,day);
								nowdate=new Date(nowyear,nowmonth,nowday);
								timedif=nowdate-inputdate;
								eval("validForm."+fieldName).value = year+"-"+month+"-"+day;
								return true;
							}
							else{
								return false;
							}
						}
						else{
							return false;
						}
					}
					else{
						return false;

					}
				}
				else{
					return false;
				}
			}
			else{
				return false;
			}
							}
// *************************************************
// *                   私有函数                    *
// *************************************************

//是否为合法的日期；合法返回true
function IsDateValide(year, month, day)
{
  bi = (year%400==0 || (year%4==0 && year%100!=0));
  if ( ( month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12 ) && day >= 1 && day <= 31)
    { correct = true;}
    else
    {
	  if ( ( month == 4 || month == 6 || month == 9 || month == 11 ) && day >= 1 && day <= 30)
	  { correct = true;}
	  else
	  {
		if (bi)
		{ correct = ( day >= 1 && day <= 29 && month == 2);}
		else
		{ correct = ( day >= 1 && day <= 28 && month == 2);}
	  }
	}
  return correct;  
}


AlphaChars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
NumChars = "0123456789";
AlphaNumChars = AlphaChars + NumChars;
HexaChars = "ABCDEFabcdef";

//字符串是否为一整型数据
function IsNumeric(Data) {
	var It = true;
	var c;
	for (var x = 0; x < Data.length; x++)
		if (It) {
			c = Data.charAt(x);
			It = ( NumChars.indexOf(c) != -1);
		}
	return It;
}

//字符串中是否只包含数字
function IsNum(Data) {
	var It = true;
	var c;
	for (var x = 0; x < Data.length; x++)
		if (It) {
			c = Data.charAt(x);
			It = ( NumChars.indexOf(c) != -1);
		}
	return It;
}
//字符串中是否只包含英文字符何数字
function IsAlphaNum(Data) {
	var It = true;
	var c;
	for (var x = 0; x < Data.length; x++)
		if (It) {
			c = Data.charAt(x);
			It = ( AlphaNumChars.indexOf(c) != -1);
		}
	return It;
}

//字符串是否为一十进制数字
function IsDecimal(Data) {
	var It = true;
	var virgule = false;
	var c;
	c = Data.charAt(0);	
	It = ( (NumChars.indexOf(c) != -1) || (c == "+") || (c=="-") );
	for (var x = 1; x < Data.length; x++)
		if (It) {
			c = Data.charAt(x);
			if ( (c==".") || (c == ",") )
				if (virgule) 
					It = false;
				else {
					It = true;
					virgule = true;
				}
			else
				It = (NumChars.indexOf(c) != -1);
		}
	return It;
}

//字符串中是否只包含英文数字
function IsAlpha(Data) {
	var It = true;
	var c;
	for (var x = 0; x < Data.length; x++)
		if (It) {
			c = Data.charAt(x);
			It = ( AlphaChars.indexOf(c) != -1);
		}
	return It;
}