How to set a min. required password of 4 characters

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Hello everybody. I'm attempting to add a required password with a min. of 4 characters long. I've added the code for the password, but do not quite understand how to add the minimum amount of characters to this. Here is the code so far.

In advance, I appreciate the help.

HTML

<!--Begin: Login.html -->

<HTML>
	<HEAD>
		<STYLE>
		.defaultText { font-family: Helvetica,Arial; font-size:10pt; }
		</STYLE>

		<SCRIPT LANGUAGE="JAVASCRIPT">
		    function validate()
		    {
			if (document.forms.main.username.value == "")
		        {
			    alert("Username cannot be empty.");
			    return false;
			}
			else if (document.forms.main.password.value == "")
			{
			    alert("Password cannot be empty.");
			    return false;
			}	
			return true;
		     }
		</SCRIPT>
		<SCRIPT>
			Function validate()
			{
			if (document.forms.main.password.value >4);
				{
				alert ("Password must be at least 4 characters long.");
				return false
				}
				return true;
			}
		
		</SCRIPT>
		
	</HEAD>
	
	<BODY>
		<FORM NAME="main" ACTION="ShowAllItems.html" METHOD="POST">
			<table>


				<tr class="defaultText">
				    	<td>username:</td>
					<td><INPUT TYPE="text" NAME="username"></INPUT></td>			
				</tr>


	
				<tr class="defaultText">
				   	<td>password:</td>
					<td><INPUT TYPE="password" NAME="password"></INPUT></td>
				</tr>
		


				<tr>
				    <td colspan="2" align="center">
				    <INPUT TYPE="submit" VALUE="Submit"

				 önclick="return validate()"></INPUT>
				     </td>
				</tr>
			</table>	</FORM>
	
</HTML>

Posted 26-Oct-12 10:19am

Donato Hernandez

Updated 26-Oct-12 10:21am

André Kraak

v2

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fjdiewornncalwe · Accepted Answer · 2012-10-26T10:53:00

Solution 1

Change if (document.forms.main.password.value >4);
to if (document.forms.main.password.value.length < 4);

A second issue I see, however, is that you have two functions listed as validate().
You should either rename one or move all the code into a single function. My suggestion would be to use a single validate function.

Posted 26-Oct-12 10:53am

fjdiewornncalwe

Updated 26-Oct-12 11:16am

v3

Comments

Donato Hernandez 26-Oct-12 17:12pm

//If changing the line to this
if (document.forms.main.password.value.length < 4);

does would I have to create a separate change it in the table too?

for example. I currently have

<TR CLASS="defaultText">
<TD>password:</TD>
<TD><INPUT TYPE="password" NAME="password"></INPUT></TD>
</TR>

which is in order to add my initial password. Would I create another one, just adding
length<4 </Input><TD>

fjdiewornncalwe 26-Oct-12 17:15pm

No it should work fine as it is.

Sergey Alexandrovich Kryukov 26-Oct-12 17:24pm

Good catch, a 5, but could be other problems...
--SA

fjdiewornncalwe 27-Oct-12 13:23pm

Agreed that there are many other potential gotcha's here, but clearly the OP is quite new and I thought he could learn something valuable from even this small instruction.

Sergey Alexandrovich Kryukov 27-Oct-12 22:53pm

Right...
--SA

Donato Hernandez 26-Oct-12 18:13pm

Thank you for the help. I really appreciate you taking the time. Here is what I have and was worked like a champ.