Forms >>> Basic Validation.


		<script 
		language="javascript"
		type="text/javascript">

		/* Visit http://www.yaldex.com/ 
		for full source code

		and get more free JavaScript, CSS and DHTML scripts! */

		<!-- Begin

		function 
		checkrequired(which)
		{

		var 
		pass=true;

		if
		(document.images)
		{

		for
		(i=0;i<which.length;i++)
		{

		var 
		tempobj=which.elements[i];

		if
		(tempobj.name.substring(0,8)=="required")
		{

		if
		(((tempobj.type=="text"||tempobj.type=="textarea")&&

		tempobj.value=='')||(tempobj.type.toString().charAt(0)=="s"&&

		tempobj.selectedIndex==0))
		{

		pass=false;

		break;

		         
		}

		      
		}

		   
		}

		}

		if
		(!pass)
		{

		shortFieldName=tempobj.name.substring(8,30).toUpperCase();

		alert("Please 
		make sure the "+shortFieldName+" 
		field was properly completed.");

		return
		false;

		}

		else

		return 
		true;

		}

		//  End -->

		</script>

		<form
		onSubmit="return 
		checkrequired(this)">

		<pre>

		Name:     
		<input 
		type="text"
		name="requiredname">

		Email:    
		<input 
		type="text"
		name="requiredemail">

		Hobby:    
		<select 
		name="requiredhobby">

		<option 
		selected>Pick 
		an option!

		<option>1

		<option>2

		<option>3

		</select>

		Comments: 
		<textarea
		name="requiredcomments"></textarea>

		<input 
		type=submit
		value="Submit">

		</pre>

		</form>