function IsEmpty(value) 
{
	if ((value.length==0) || (value==null)) 
	{
		return true;
	}
	else { 
		return false; 
	}
}	

function IsNumeric(sText) 
{
	var ValidChars = "0123456789.";
	var IsNumber=true;
	var Char;	
	
	for (i = 0; i < sText.length && IsNumber == true; i++) 
	{ 
		Char = sText.charAt(i); 
		if (ValidChars.indexOf(Char) == -1) 
		{
			IsNumber = false;
		}
	}
	return IsNumber;	
}

function IsValidEmail(str) 
{
	return (str.indexOf(".") > 2) && (str.indexOf("@") > 0);
}

function FormatNumber(Number,Decimals,Separator) 
{ 
 // ********************************************************** 
 // 
 // November 24, 1998 -- Error which allowed a null value 
 // to remain null fixed. Now forces value to 0. 
 // 
 // This function accepts a number to format and number 
 // specifying the number of decimal places to format to. May 
 // optionally use a separator other than '.' if specified. 
 // 
 // If no decimals are specified, the function defaults to 
 // two decimal places. If no number is passed, the function 
 // defaults to 0. Decimal separator defaults to '.' . 
 // 
 // If the number passed is too large to format as a decimal 
 // number (e.g.: 1.23e+25), or if the conversion process 
 // results in such a number, the original number is returned 
 // unchanged. 
 // ********************************************************** 
 Number += ""          // Force argument to string. 
 Decimals += ""        // Force argument to string. 
 Separator += ""       // Force argument to string. 
 if((Separator == "") || (Separator.length > 1)) 
  Separator = "." 
 if(Number.length == 0) 
  Number = "0" 
 var OriginalNumber = Number  // Save for number too large. 
 var Sign = 1 
 var Pad = "" 
 var Count = 0 
 // If no number passed, force number to 0. 
 if(parseFloat(Number)){ 
  Number = parseFloat(Number)} else { 
  Number = 0} 
 // If no decimals passed, default decimals to 2. 
 if((parseInt(Decimals,10)) || (parseInt(Decimals,10) == 0)){ 
  Decimals = parseInt(Decimals,10)} else { 
  Decimals = 2} 
 if(Number < 0) 
 { 
  Sign = -1         // Remember sign of Number. 
  Number *= Sign    // Force absolute value of Number. 
 } 
 if(Decimals < 0) 
  Decimals *= -1    // Force absolute value of Decimals. 
 // Next, convert number to rounded integer and force to string value. 
 // (Number contains 1 extra digit used to force rounding) 
 Number = "" + Math.floor(Number * Math.pow(10,Decimals + 1) + 5) 
 if((Number.substring(1,2) == '.')||((Number + '')=='NaN')) 
  return(OriginalNumber) // Number too large to format as specified. 
 // If length of Number is less than number of decimals requested +1, 
 // pad with zeros to requested length. 
 if(Number.length < Decimals +1) // Construct pad string. 
 { 
  for(Count = Number.length; Count <= Decimals; Count++) 
   Pad += "0" 
 } 
 Number = Pad + Number // Pad number as needed. 
 if(Decimals == 0){ 
  // Drop extra digit -- Number is formatted. 
  Number = Number.substring(0, Number.length -1)} else { 
  // Or, format number with decimal point and drop extra decimal digit. 
 Number = Number.substring(0,Number.length - Decimals -1) + 
          Separator + 
          Number.substring(Number.length - Decimals -1, 
          Number.length -1)} 
 if(Sign == -1) 
  Number = "-" + Number  // Set sign of number. 
 if(Number.length == 0) 
  Number="0" 
 return(Number) 
}