function validate_required(field,alerttxt)
{
with (field)
{
  if (value==null||value=="")
  {
  alert(alerttxt);return false;
  }
  else
  {
  return true;
  }
}
}
function isPhoneNumber(s) 
{

     // Check for correct phone number
/*     rePhoneNumber = new RegExp(/^\([1-9]\d{2}\)\s?\d{3}\-\d{4}$/); **/
     rePhoneNumber = new RegExp(/^\d{3}\-\d{3}\-\d{4}$/);
     if (!rePhoneNumber.test(s)) {
/*          alert("Phone Number Must Be Entered As: (123) 456-7891"); **/
          alert("Phone Number Must Be Entered As: 123-456-7891");
          return false;
     }

return true;
}
/*
function validate_email(field,alerttxt)
{
with (field)
{
	apos=value.indexOf("@");
	dotpos=value.lastIndexOf(".");
	if (apos<1||dotpos-apos<2) 
	  {
		alert(alerttxt);
		return false;
	  }
	else
		return true;
}
}
*/
function checkValidation(formInput) {

    if (typeof(formInput) != "object") {
        alert("Validation not supported on this browser.");
        return(false);
    }

    var message;

    if (stringEmpty(formInput.value)) {
        message = "Error! There is no email address entered.";
        alert(message);
    } else if (noAtSign( formInput.value )) {
        message = "Error! The address \"" + formInput.value + "\" does not contain an '@' character.";
        alert(message);
    } else if (nothingBeforeAt(formInput.value)) {
        message = "Error! The address \"" + formInput.value;
        message += "\" must contain at least one character before the '@' character";
        alert(message);
    } else if (noLeftBracket(formInput.value)) {
        message = "Error! The address \"" + formInput.value;
        message += "\" contains a right square bracket ']',\nbut no corresponding left square bracket '['.";
        alert(message);
    } else if (noRightBracket(formInput.value)) {
        message = "Error! The address \"" + formInput.value;
        message += "\" contains a left square bracket '[',\nbut no corresponding right square bracket ']'.";
        alert( message);
    } else if (noValidPeriod(formInput.value)) {
        message = "Error! The address \"" + formInput.value + "\" must contain a period ('.') character.";
        alert(message);
    } else if (noValidSuffix(formInput.value)) {
        message = "Error! The address \"" + formInput.value;
        message += "\" must contain a two, three or four character suffix.";
        alert(message);
    } else {
/*        message = "Success! The email address \"" + formInput.value + "\" validates OK.";
        alert(message);
		*/
		return true;
    }

    var objType = typeof(formInput.focus);
    if (objType == "object" || objType == "function") {
         formInput.focus();
    }

    return (false);
}

function stringEmpty (formField) {
    // CHECK THAT THE STRING IS NOT EMPTY
    if ( formField.length < 1 ) {
        return ( true );
    } else {
        return ( false );
    }
}

function noAtSign (formField) {
    // CHECK THAT THERE IS AN '@' CHARACTER IN THE STRING
    if (formField.indexOf ('@', 0) == -1) {
        return ( true )
    } else {
        return ( false );
    }
}

function nothingBeforeAt (formField) {
    // CHECK THERE IS AT LEAST ONE CHARACTER BEFORE THE '@' CHARACTER
    if ( formField.indexOf ( '@', 0 ) < 1 ) {
        return ( true )
    } else {
        return ( false );
    }
}

function noLeftBracket (formField) {
    // IF EMAIL ADDRESS IN FORM 'user@[255,255,255,0]', THEN CHECK FOR LEFT BRACKET
    if ( formField.indexOf ( '[', 0 ) == -1 && formField.charAt (formField.length - 1) == ']') {
        return ( true )
    } else {
        return ( false );
    }
}

function noRightBracket (formField) {
    // IF EMAIL ADDRESS IN FORM 'user@[255,255,255,0]', THEN CHECK FOR RIGHT BRACKET
    if (formField.indexOf ( '[', 0 ) > -1 && formField.charAt (formField.length - 1) != ']') {
        return ( true );
    } else {
        return ( false );
    }
}

function noValidPeriod (formField) {
    // IF EMAIL ADDRESS IN FORM 'user@[255,255,255,0]', THEN WE ARE NOT INTERESTED
    if (formField.indexOf ( '@', 0 ) > 1 && formField.charAt (formField.length - 1 ) == ']')
        return ( false );

    // CHECK THAT THERE IS AT LEAST ONE PERIOD IN THE STRING
    if (formField.indexOf ( '.', 0 ) == -1)
        return ( true );

    return ( false );
}

function noValidSuffix(formField) {
    // IF EMAIL ADDRESS IN FORM 'user@[255,255,255,0]', THEN WE ARE NOT INTERESTED
    if (formField.indexOf('@', 0) > 1 && formField.charAt(formField.length - 1) == ']') {
        return ( false );
    }

    // CHECK THAT THERE IS A TWO OR THREE CHARACTER SUFFIX AFTER THE LAST PERIOD
    var len = formField.length;
    var pos = formField.lastIndexOf ( '.', len - 1 ) + 1;
    if ( ( len - pos ) < 2 || ( len - pos ) > 4 ) {
        return ( true );
    } else {
        return ( false );
    }
}

function validate_form(thisform)
{
with (thisform)
	{
	if (validate_required(ContactName,"Name is required!")==false)
		{
			ContactName.focus();
			return false;
		}
	if (isPhoneNumber(Phone.value)==false)
		{
			Phone.focus();
			return false;
		}
/*	if (validate_email(Email,"Email must be filled out!")==false)
		{
			Email.focus();
		  	return false;
		}
*/
	    if ( checkValidation ( Email ) == true ) {
	        return true;
	    }

	    return ( false );
	
}
}