function validRequired(formField,fieldLabel)
{
	var result = true;
	
	if (formField.value == "")
	{
		alert('Please enter a value for the "' + fieldLabel +'" field.');
		formField.focus();
		result = false;
	}
	
	return result;
}


function allDigits(str)
{
	return inValidCharSet(str,"0123456789");
}


function allAlphe(str)
{
	return inValidCharSet(str,"ABCDEFGHIJKLMNOPQRSTUVWXYZ");
}


function allDigitsAlphe(str)
{
	return inValidCharSet(str,"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ");
}


function inValidCharSet(str,charset)
{
	var result = true;

	// Note: doesn't use regular expressions to avoid early Mac browser bugs	
	for (var i=0;i<str.length;i++)
		if (charset.indexOf(str.substr(i,1))<0)
		{
			result = false;
			break;
		}
	
	return result;
}


function validNum(formField,fieldLabel,required)
{
	var result = true;

	if (required && !validRequired(formField,fieldLabel))
		result = false;
  
 	if (result)
 	{
 		if (!allDigits(formField.value))
 		{
 			alert('Please enter a number for the "' + fieldLabel +'" field.');
			formField.focus();		
			result = false;
		}
	} 
	
	return result;
}

function validSIN(formField,fieldLabel,required)
{

	if (required && !validRequired(formField,fieldLabel))
		return false;
     
    if (!allDigits(formField.value))
 	  {
 	    alert('Please enter only number for the "' + fieldLabel +'" field.');
		 formField.focus();		
		 return false;
	  }
	  
	if(formField.value.length < 9)
	 	{
          alert('Please enter a valid SIN for the "' + fieldLabel +'" field- wrong length');
          formField.focus();		
		   return false;
	   }
	 
	return true;
}


function validDate(formField,fieldLabel,required)
{
	var result = true;

	if (required && !validRequired(formField,fieldLabel))
		result = false;
  
 	if (result)
 	{
 		var elems = formField.value.split("-");
 		
 		result = (elems.length == 3); // should be three components
 		
 		if (result)
 		{       
 			var year = parseInt(elems[0],10);
 			var month = parseInt(elems[1],10);
  			var day = parseInt(elems[2],10);
 			
			result = allDigits(elems[1]) && (month > 0) && (month < 13) &&
					 allDigits(elems[2]) && (day > 0) && (day < 32) &&
					 allDigits(elems[0]) && ((elems[0].length == 2) || (elems[0].length == 4));
 		}
 		
  		if (!result)
 		{
 			alert('Please enter a date in the format YYYY-MM-DD for the "' + fieldLabel +'" field.');
			formField.focus();		
		}
	} 
	
	return result;
}


function validDate1(formField,fieldLabel)
{
	var result = true;

	
 	if (!(formField.value == ""))
 	{
 		var elems = formField.value.split("-");
 		
 		result = (elems.length == 3); // should be three components
 		
 		if (result)
 		{       
 			var year = parseInt(elems[0],10);
 			var month = parseInt(elems[1],10);
  			var day = parseInt(elems[2],10);
 			
			result = allDigits(elems[1]) && (month > 0) && (month < 13) &&
					 allDigits(elems[2]) && (day > 0) && (day < 32) &&
					 allDigits(elems[0]) && ((elems[0].length == 2) || (elems[0].length == 4));
 		}
 		
  		if (!result)
 		{
 			alert('Please enter a date in the format YYYY-MM-DD for the "' + fieldLabel +'" field.');
			formField.focus();		
		}
	} 
	
	return result;
}


function validYear(formField,fieldLabel,required)
{
	var result = true;

	if (required && !validRequired(formField,fieldLabel))
		result = false;
	
	if (result)
 	{
 	    var year = parseInt(formField.value,10);
	    result = allDigits(formField.value) && (formField.value.length == 4);
          
        if (!result)
 		{
 		  alert('Please enter a year in the format YYYY for the "' + fieldLabel +'" field.');
		  formField.focus();		
		}
	}
	return result;
} 

function validMonth(formField,fieldLabel,required)
{
	var result = true;

	if (required && !validRequired(formField,fieldLabel))
		result = false;
	
	if (result)
 	{
 	    var month = parseInt(formField.value,10);
	    result = allDigits(formField.value) && (month > 0) && (month < 13);
          
        if (!result)
 		{
 		  alert('Please enter a month in the format MM for the "' + fieldLabel +'" field.');
		  formField.focus();		
		}
	}
	return result;
} 
  
function validDay(formField,fieldLabel,required)
{
	var result = true;

	if (required && !validRequired(formField,fieldLabel))
		result = false;
	
	if (result)
 	{
 	    var day = parseInt(formField.value,10);
	    result = allDigits(formField.value) && (day > 0) && (day < 32);
          
        if (!result)
 		{
 		  alert('Please enter a day in the format DD for the "' + fieldLabel +'" field.');
		  formField.focus();		
		}
	}
	return result;
} 

 function isEmailAddr(email)
{
  var result = false;
  var theStr = new String(email);
  var index = theStr.indexOf("@");
  if (index > 0)
  {
    var pindex = theStr.indexOf(".",index);
    if ((pindex > index+1) && (theStr.length > pindex+1))
	result = true;
  }
  return result;
}  

 function validEmail(formField,fieldLabel,required)
{
	var result = true;
	
	if (required && !validRequired(formField,fieldLabel))
		result = false;

	if (result && ((formField.value.length < 3) || !isEmailAddr(formField.value)) )
	{
		alert("Please enter a complete email address in the form: yourname@yourdomain.com");
		formField.focus();
		result = false;
	}
   
  return result;

}

function validInt(formField,fieldLabel,required)
{
	var result = true;

	if (required && !validRequired(formField,fieldLabel))
		result = false;
  
 	if (result)
 	{
 		var num = parseInt(formField.value,10);
 		if (isNaN(num))
 		{
 			alert('Please enter a number for the "' + fieldLabel +'" field.');
			formField.focus();		
			result = false;
		}
	} 
	
	return result;
}

function validFloat(formField,fieldLabel,required)
{
	var result = true;

	if (required && !validRequired(formField,fieldLabel))
		result = false;
  
 	if (result)
 	{
 		var num = parseFloat(formField.value,10);
 		if (isNaN(num))
 		{
 			alert('Please enter a number for the "' + fieldLabel +'" field.');
			formField.focus();		
			result = false;
		}
	} 
	
	return result;
}


function validPostCode(formField,fieldLabel,required)
{
	if (required && !validRequired(formField,fieldLabel))
          return false;
         
    var size = formField.value.length;
    
    if (size < 6)
    { //Code length rule
      alert('Please enter a valid postcode for the "' + fieldLabel +'" field- wrong length');
      formField.focus();		
      return false;
    }
    
    if (!allAlphe(formField.value.charAt(0)))
     { //test the second char
      alert('Please enter a valid postcode for the "' + fieldLabel +'" field');
      formField.focus();		
      return false;
    }
    
    if (!allDigits(formField.value.charAt(1)))
     { //test the second char
      alert('Please enter a valid postcode for the "' + fieldLabel +'" field');
      formField.focus();		
      return false;
    }
    
    if (!allAlphe(formField.value.charAt(2)))
     { //test the second char
      alert('Please enter a valid postcode for the "' + fieldLabel +'" field');
      formField.focus();		
      return false;
    }
    
    if (!allDigits(formField.value.charAt(size-3)))
     { //test the second char
      alert('Please enter a valid postcode for the "' + fieldLabel +'" field');
      formField.focus();		
      return false;
    }
    
    if (!allAlphe(formField.value.charAt(size-2)))
     { //test the second char
      alert('Please enter a valid postcode for the "' + fieldLabel +'" field');
      formField.focus();		
      return false;
    }
    
    if (!allDigits(formField.value.charAt(size-1)))
     { //test the second char
      alert('Please enter a valid postcode for the "' + fieldLabel +'" field');
      formField.focus();		
      return false;
    }
    
   return true;
}


function validVIN(formField,fieldLabel,required)
{
	var result = true;

	if (required && !validRequired(formField,fieldLabel))
		result = false;
  
 	if (result)
 	{
 		if (!allDigitsAlphe(formField.value))
 		{
 			alert("Only input the number and Alphebets in the " +fieldLabel +'" field.-no space allowed');
			formField.focus();		
			result = false;
		}
	} 
	
	return result;
}

function validPhoneNum(formField,fieldLabel,required)
{
	var result = true;

	if (required && !validRequired(formField,fieldLabel))
		result = false;
   
     var counter=0;
 	if (result)
 	{
 		for(var i=0; i<formField.value.length; i++)
 		{
	 	  if (allDigits(formField.value.charAt(i)))
 		       counter++;
 		}
 		
 		if (counter < 7)
 		 result=false;
 		 
  		if (!result)
 		{
 			alert('Please enter a valid phone number for the "' + fieldLabel +'" field.- at least 7 digitial number');
			formField.focus();		
		}
	} 
	
	return result;
}

function validate(refForm)
{
	if(!validRequired(refForm.txtFirstName,"First Name"))
		return false;
	
	if(!validRequired(refForm.txtLastName,"Last Name"))
		return false;
		
	if(!validRequired(refForm.txtAddress,"Address"))
		return false;
	
	if(!validRequired(refForm.txtCity,"City"))
		return false;
		
	if(!validPostCode(refForm.txtPostal,"Postal Code",true))
		return false;
		
	if(!validPhoneNum(refForm.txtPhone,"Phone Number",true))	
		return false;
		
	//if(!validEmail(refForm.txtEmail,"Email",true))
	//	return false;
		
	return true;
}