<!--form validation functions-->
 function IsEmpty(aTextField) {
   if ((aTextField.length==0) ||
   (aTextField==null)) {
      return true;
   }
   else { return false; }
}

function isValidEmail(str) {
   return (str.indexOf(".") > 0) && (str.indexOf("@") > 0);
 
}

function IsAlpha(aText)
{
   var aValidChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz ";
   var IsAlpha=true;
   var Char;

 
   for (a = 0; a < aText.length && IsAlpha == true; a++) 
      { 
      Char = aText.charAt(a); 
      if (aValidChars.indexOf(Char) == -1) 
         {
         IsAlpha = false;
         }
      }
   return IsAlpha;
   
   }
   
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 IsCCNum(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;
         }
		if(sText.length != 16)
		{
			IsNumber = false;
		}
      }
   return IsNumber;
   
   }
   
   function IsZip(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;
         }
		if(sText.length != 5)
		{
			IsNumber = false;
		}
      }
   return IsNumber;
   
   }
   
   function IsPhone(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;
         }
		if(sText.length != 10)
		{
			IsNumber = false;
		}
      }
   return IsNumber;
   
   }
   
<!--end form validation functions-->