// BEGIN GENERAL VALIDATE

// Define regular expression objects

// one or more digits
var digits_re = /[1-9]+/;

// one or more digits
var non_digits_global_re = /\D+/g;

// one or more letters
var letter_re = /^[A-Za-z]+/;

// one or more letters or numbers
var alpha_re = /^[A-Za-z0-9]+/;

// one or more letters or numbers
var non_alpha_re = /\W+/g;

// valid email format
var email_re = /^[A-Za-z0-9]+\@[A-Za-z0-9]+\.[A-Za-z]+\b/;

// Validate email field
function isMail(sElement){
    if(!sElement){
        alert("The email field is undefined.");
        return false;
    }
	var emailVal = sElement.value.search(email_re);
	if(emailVal == -1){
		sElement.focus();
		alert("You must enter a valid email address.");
		return false;
	}
	return true;
}

function isLetter(sElement, sErrorText){
    if(!sElement){
        alert("This field is undefined. It's errortext is: " + sErrorText);
        return false;
    }
    var ltrVal = sElement.value.search(letter_re);
	if(ltrVal == -1){
		sElement.focus();
		if(arguments.length > 1){
		    alert("You must enter " + sErrorText + ".");
		}
		return false;
	} else {
	    return true;
	}
}

function isDigit(sElement, sErrorText){
    if(!sElement){
        alert("This field is undefined. It's errortext is: " + sErrorText);
        return false;
    }
    var DgtVal = sElement.value.search(digits_re);
	if(DgtVal == -1){
		sElement.focus();
		if(arguments.length > 1){
		    alert("You must enter " + sErrorText + ".");
		}
		return false;
	} else {
	    return true;
	}
}

function noNonDigits(sElement, sErrorText){
    if(!sElement){
        alert("This field is undefined. It's errortext is: " + sErrorText);
        return false;
    }
    var DgtVal = sElement.value.search(non_digits_global_re);
	if(sElement.value== ''){
		sElement.focus();
		if(arguments.length > 1){
		    alert("You must enter " + sErrorText + ".");
		}
		return false;
	}
	if(DgtVal != -1){
		sElement.focus();
		if(arguments.length > 1){
		    alert("You must enter " + sErrorText + ".");
		}
		return false;
	} else {
	    return true;
	}
}

function isAlpha(sElement, sErrorText){
    if(!sElement){
        alert("This field is undefined. It's errortext is: " + sErrorText);
        return false;
    }
    var ltrVal = sElement.value.search(alpha_re);
	if(ltrVal == -1){
		sElement.focus();
		if(arguments.length > 1){
		    alert("You must enter " + sErrorText + ".");
		}
	} else {
	    return true;
	}
}

function isPhone(sAreaCode, sPrefix, sSuffix, sExt, sPhoneOut, ErrorText){
    
    if((!isDigit(sAreaCode)) || (sAreaCode.value.length < 3)){
        sAreaCode.focus();
		alert("You must enter " + ErrorText +".");
		return false;
    }
    if((!isDigit(sPrefix, ErrorText)) || (sPrefix.value.length < 3)){
        sPrefix.focus();
		alert("You must enter " + ErrorText +".");
		return false;
	}
    if((!isDigit(sSuffix, ErrorText)) || (sSuffix.value.length < 4)){
        sSuffix.focus();
		alert("You must enter " + ErrorText +".");
		return false;
	}
    if(sExt.value != ''){
    	sPhoneOut.value = "(" + sAreaCode.value + ") " + sPrefix.value + "-" + sSuffix.value + " ext " + sExt.value;
    } else {
    	sPhoneOut.value = "(" + sAreaCode.value + ") " + sPrefix.value + "-" + sSuffix.value;
    }
    return true;
}

function isZipCode(sElement, ErrorText){
    if((sElement.length < 5) || !(isDigit(sElement, ErrorText))){
        sElement.focus();
		alert("You must enter " + ErrorText +".");
		return false;
	} else {
	    return true;
	}
}

function isSelected(sElement, sDefault ,sErrorText){
    if(!sElement){
        alert("This field is undefined. It's errortext is: " + sErrorText);
        return false;
    }
	if(sElement.options[sElement.selectedIndex].value == sDefault){
		sElement.focus();
		alert("You must enter " + sErrorText + ".");
		return false;
	}
	return true;
}

function isPassword(sElement1, sElement2){
    var pwdVal1 = sElement1.value.search(alpha_re);
    var pwdValNonChar1 = sElement1.value.search(non_alpha_re);
	if((pwdVal1 == -1) || (pwdValNonChar1 != -1) || (sElement1.value.length < 5) || (sElement1.value.length > 20)){
		sElement1.focus();
	    alert("Your must enter a password that is 5 to 20 characters long.\nYou may use any combination of letters or numbers, but \ndo not enter spaces or other characters.");
	    return false;
	}
	if(arguments.length > 1){ // IF USING THIS FUNCTION TO COMPARE NEW PASSWORD RE-ENTRY
        var pwdVal2 = sElement2.value.search(alpha_re);
        var pwdValNonChar2 = sElement2.value.search(non_alpha_re);
        if((pwdVal2 == -1) || (pwdValNonChar2 != -1) || (sElement2.value.length < 5) || (sElement2.value.length > 20) || (sElement1.value != sElement2.value)){
        	sElement2.focus();
            alert("Your password re-entry does not match your password.");
            return false;
    	}
    }
    return true;
}

function isStrPhone(sElement){
    var phone_re = /^\([0-9]{3}\W+[0-9]{3}\-[0-9]{4}\b/;
    if(!sElement){
        alert("This field is undefined. It's errortext is: " + sErrorText);
        return false;
    }
    var PhoneVal = sElement.value.search(phone_re);
	if(PhoneVal == -1){
		sElement.focus();
	    alert(sElement.value + " is an invalid " + sElement.name + " number format.\nThe valid format is: (111) 111-1111\nPlease correct your entry.\n");
	} else {
	    return true;
	}
}

function miUp(sElement){
    if(sElement){
        sElement.value = sElement.value.toUpperCase();
    }
    return true;
}
// END GENERAL VALIDATE