¿Cómo hacer links para "ver más"?

El problema es que no sé nada de html...
¿Puede alguien escribir las instrucciones necesarias?
Estaría muy agradecido.

Mira, llevo haciendo eso desde antes de postear esto, el problema es que no sé cómo se llama lo que busco.
No hace falta que sigas comentando, porque sé que aquí hay gente que puede ayudarme y van de buen rollo.
Saludos.

Ok. Muchísimas gracias, necesitaba antes estos conceptos. Ahora lo tengo claro.
Gracias de verdad.

Lo que dice erdanblo, es lo más común que se suele ver, pero se me ocurre una forma de que lo puedas hacer en un solo documento. La idea básica es que al principio, el cuerpo de la noticia esté en un div con una altura determinada y con overflow:elquehacequenoseveaeltextoynollevascroll, y que al hacer click en el vínculo se le atribuya al div una altura 'auto'.

Voy a probarlo, y si funca lo posteo.

#12, justo a lo que me refería yo.

&#65279;< ?xml version="1.0" encoding="utf-8"?>
< !DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

< html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">

< head>
< title>Ver mas< /title>
< meta http-equiv="content-type" content="text/html; charset=utf-8" />
< style type="text/css" charset="utf-8" media="all">
html, body
{
font-family: Tahoma, sans;
padding: 0 0 0 0;
margin: 0 0 0 0;
}

	div
	{
		height: 4em;
		overflow: hidden;
		width: 420px;
		border: 1px solid #999;
		background-color: #eee;
	}
< /style>
< script language="javascript" type="text/javascript">
	var Noticias = Array ();
	
	function changeView(divId)
	{
		var HTMLobj = document.getElementById(divId).style;
		
		if (Noticias[divId] == 0 || !Noticias[divId]) {
			HTMLobj.height = 'auto';
			Noticias[divId] = 1;
		} else {			
			HTMLobj.height = '4em';
			Noticias[divId] = 0;
		}
	}
< /script>

< /head>

< body>
< div id="Noticia__N" class="NOculta">
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< /div>
< a href="javascript: changeView('Noticia__N'); ">Ver más...< /a>
< /body>

< /html>

Veamos, he hecho algunos pequeños progresos.
De momento sé cómo hacer para poner una capa en la que escribir el texto para que aparezca después.
Pero todavía no sé cómo definir el "oveflow" para que no se muestre desde el principio, sinó que lo haga al hacer clic en el enlace deseado.
¿Cómo puedo hacerlo?