//Start form validation (Check for name and email)
function check_form(f) {
if(f.firstName.value.length < 1){
alert("Please enter your first name.");
f.firstName.focus(); 
f.firstName.style.background = "#FFFF9D";
return false;
}
if(f.lastName.value.length < 1){
alert("Please enter your last name.");
f.lastName.focus(); 
f.lastName.style.background = "#FFFF9D";
return false;
}
// check the first email address ( the exclamation means "not" )
if(!check_email(f.Email.value)){
alert("Invalid email detected.");
f.Email.focus(); 
f.Email.style.background = "#FFFF9D";
return false;
}
}

// Email Validation. Written by PerlScriptsJavaScripts.com

function check_email(e) {
ok = "1234567890qwertyuiop[]asdfghjklzxcvbnm.@-_QWERTYUIOPASDFGHJKLZXCVBNM";

for(i=0; i < e.length ;i++){
if(ok.indexOf(e.charAt(i))<0){ 
return (false);
}	
} 
if (document.images) {
re = /(@.*@)|(\.\.)|(^\.)|(^@)|(@$)|(\.$)|(@\.)/;
re_two = /^.+\@(\[?)[a-zA-Z0-9\-\.]+\.([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/;
if (!e.match(re) && e.match(re_two)) {
return (-1);		
} 
}
}

function limitText(limitField, limitCount, limitNum) {
	if (limitField.value.length > limitNum) {
		limitField.value = limitField.value.substring(0, limitNum);
	} else {
		limitCount.value = limitNum - limitField.value.length;
	}
}