JavaScript - Code Help For Basic Email And Password Validation.

<script type="text/javascript">
 function required(){
    var first = document.forms["register1"].elements["fname"].value;
    var last = document.forms["register1"].elements["lname"].value;
    var email = document.forms["register1"].elements["email"].value;
    var message = document.forms["register1"].elements["phone"].value;
 
    if(first == null || first == "" || last == null || last == ""){
        alert("First and last name fields are required.");
        return false;
    }
    else if(email == null || email == ""){
        alert('An email address is required.');
        return false;
    } 
	else if (email.indexOf("@")<1 || email.indexOf(".")==-1 || email.indexOf(",")!=-1 || email.indexOf(" ")!=-1 || email.length<6)
	{
    alert('Please enter a valid E-mail address.\n" +
    "Example: myname@domainname.com");
    register1.email.focus();
    return false;
  }	
    else if(message == null || message == ""){
        alert('A phone number is required.');
        return false;
    }else{return true;}
}
 </script>

function MM_validateForm() { //v4.0
  var i,p,q,nm,test,num,min,max,errors='',args=MM_validateForm.arguments;
  for (i=0; i<(args.length-2); i+=3) { test=args[i+2]; val=MM_findObj(args[i]);
    if (val) { nm=val.name; if ((val=val.value)!="") {
       if (test.indexOf('isEmail')!=-1) { p=val.indexOf('@');
        if (p<1 || p==(val.length-1)) errors+='- '+nm+' must contain an e-mail address.\n'; 
      } else if (test!='R') { num = parseFloat(val);
        if (isNaN(val)) errors+='- '+nm+' must contain a number.\n';
        if (test.indexOf('inRange') != -1) { p=test.indexOf(':');
          min=test.substring(8,p); max=test.substring(p+1);
          if (num<min || max<num) errors+='- '+nm+' must contain a number between '+min+' and '+max+'.\n';
    } } } else if (test.charAt(0) == 'R') errors += '- '+nm+' is required.\n'; }
  } if (errors) alert('The following error(s) occurred:\n'+errors);
  document.MM_returnValue = (errors == '');
}

<form id="quoteform" name="contactfrm" onsubmit="MM_validateForm('First_Name','','R','Last_Name','','R','City','','R','State','','R','Zip','','R','Day_Phone','','R','Evening_Phone','','','Email','','R');return document.MM_returnValue;" action="contact.php" method="post">

<td height="32" bgcolor="#F8F8F8"><strong>Email Address:</td>
<td><input name="YOUR EMAIL" type="text" id="Email" size="30"></td>

<script type="text/javascript">
function checkForm() {
    var params=document.getElementById('myForm').serialize();
  
    if(params.fullname==''){
        displayerrormessage('Please Enter Your Full Name');     
        return false;
    }
   
    if(params.useremail==''){
        displayerrormessage('Please Enter Your Email');     
        return false;
    }
    if(params.useremail!=''){
        var emailfilter=/^w+[+.w-]*@([w-]+.)*w+[w-]*.([a-z]{2,4}|d+)$/i
        var returnval=emailfilter.test(params.useremail);
        if (returnval==false){
            displayerrormessage('Please Enter Valid Email');  
            params.useremail.select();
       }
         
        return false;
    }
    if(params.userphone==''){
        displayerrormessage('Please Enter Your Phone');     
        return false;
    }
    if(params.usercity==''){
        displayerrormessage('Please Enter Your City');     
        return false;
    }
    if(params.userstate==''){
        displayerrormessage('Please Enter Your State');     
        return false;
    }
    if(params.usercountry==''){
        displayerrormessage('Please Enter Your Country');     
        return false;
    }
    if(params.CompanyOrganization==''){
        displayerrormessage('Please Enter Your Company/Organization');     
        return false;
    }
    if(params.TitlePostion==''){
        displayerrormessage('Please Enter Your Title/Postion');     
        return false;
    }
    if(params.Message==''){
        displayerrormessage('Please Enter Your Message');     
        return false;
    }
  
  
}

function displayerrormessage(message){
     new Dialog().showMessage('Erro Message',message);  
     return false;
}
</script>
<script type="text/javascript">
var emailfilter=/^w+[+.w-]*@([w-]+.)*w+[w-]*.([a-z]{2,4}|d+)$/i
function checkmail(e){
      var returnval=emailfilter.test(e.value);
      if (returnval==true){
        alert('Please enter a valid email address.')
        e.select()
       }
        return true;
    }
   
</script>

<form id="myForm">
<p>Full Name :  <input type="text" name="fullname" id="fullname"/> </p>
<p>Email     :  <input type="text" name="useremail" id="useremail"/> </p>
<p>Phone     :  <input type="text" name="userphone" id="userphone"/> </p>
<p>City      :  <input type="text" name="usercity" id="usercity"/> </p>
<p>State     :  <input type="text" name="userstate" id="userstate"/> </p>
<p>Country     :  <input type="text" name="usercountry" id="usercountry"/> </p>
<p>Company/Organization     :  <input type="text" name="CompanyOrganization" id="CompanyOrganization"/> </p>
<p>Title/Postion     :  <input type="text" name="TitlePostion" id="TitlePostion"/> </p>
<p>Your Message     :  <input type="text" name="Message" id="Message"/> </p>
  <input type="button" name="nameuser1" id="nameuser1" onclick="checkForm();" value="Submit"/>
</form>

              else if (fld.value(".com")==-1 && entEmail.indexOf(".net")==-1      && entEmail.indexOf(".org")==-1 && entEmail.indexOf(".edu")==-1) {
		 window.alert("Please recheck your email address. it must in     name@domain.xxx format.");
		return false;
	 }

if((document.subscribe.contacttype.selectedIndex==1) && (document.subscribe.email.value=="")){
		alert("Please enter a Valid Email Address.");
		return false;
		}
		else{
			if((document.subscribe.email.indexOf('@') < 0) || ((document.subscribe.email.charAt(email.length-4) != '.') && (document.subscribe.email.charAt(email.length-3) != '.')))
			{alert("you have entered an invalid Email Address. Please try again.");
			}
		}
}

function confirmquote()
{
var answer=confirm("Do you want to recieve a quote?");
if (answer==true)
  {
  var emailID=window.prompt("Please enter a VALID email address or type quit to exit");
  }
else
  {
  alert("Quote has been rejected sir, please refreash to start order agian.");
  }
}

}
function CheckEmail() 
	{
		emailID = document.f1.Email.value
		AtPos = emailID.indexOf("@")
		StopPos = emailID.lastIndexOf(".")
		Message = ""

	if (emailID == "") 
	{
	Message = "Not a valid Email address" + "\n"
	}

	if (AtPos == -1 || StopPos == -1) {
	Message = "Not a valid email address"
	}

	if (StopPos < AtPos) {
	Message = "Not a valid email address"
}

if (StopPos - AtPos == 1) {
Message = "Not a valid email address"
}

return Message
}

var worknowplease = confirmquote();
var emailID=checkemail();

<script>

function validateForm()
{
var x=document.forms["WebsiteQuestion"]["Email"].value;
var atpos=x.indexOf("@");
var dotpos=x.lastIndexOf(".");
if (atpos<1 || dotpos<atpos+2 || dotpos+2>=x.length)
  {
  alert("Not a valid e-mail address");
  return false;
  }
}

function clearForms()
{
  var i;
  for (i = 0; (i < document.forms.length); i++) {
    document.forms[i].reset();
  }
}
</script>

 <div align="center">
   <script language="javascript" src="http://www.captcha.cc/cap.js?cap_k=tocsoLPahVjmEHJZWtenaJEDoJXfrQaa" type="text/javascript">
</script>
<input type=hidden name=cap_h id=cap_h value="">
<img border=1 id=cap_i src="http://www.captcha.cc/img.cgi?cap_k=tocsoLPahVjmEHJZWtenaJEDoJXfrQaa" align=middle><img align=middle style="margin-left: 4px;" id=cap_r onload="return cap_showReload(event);" src="http://www.captcha.cc/blank.png"><br>
<input id=cap_t name=cap_t type=text value="" style="margin-top:4px;">
<input type=submit value="Submit Form" onclick="return cap_valid(event);">
</div>

<html>
<head>
<title>Click the button</title>
<script type="text/javascript">

function x() {
	window.alert('1');
	window.alert('2');
	window.alert('3');
	}

document.getElementById("y").onclick = x;

</script>
</head>
<body>
<form>
<input type="button" value="Click the button" id="y" />
</form>
</body>
</html>

<input type="text" name="user_email" id="user_email" />
<input type="text" name="user_email2" id="user_email2" />

<script type="text/javascript">
var email1 = document.getElementById(user_email);
var email2 = document.getElementById(user_email2);
function checkEmail(){
if (email1 != email2)
{
alert("The two email addresses are not the same");
}
}
</script>

<input type="submit" name="submit" id="submit" onSubmit="checkEmail" />

<html>
<body>
<form name="myForm" onsubmit="return chkEmail()" method="post">
e: <input type="text" name="fname">
<input type="submit" value="Submit">
</form>
</body>
</html>

function validateEmail(email) { 
    var re = /^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
    return re.test(email);
}
 
function chkEmail(){
	var myString = document.forms["myForm"]["fname"].value;
	var mySplitResult = myString.split(",");
	for(i = 0; i < mySplitResult.length; i++){
		emailCheck = validateEmail(mySplitResult[i]);
		alert(mySplitResult[i] + " - " + emailCheck);
		if (emailCheck = 'false') {
			alert(emailCheck);
		}
	}
}