var banner = document.getElementById("welcome_banner");

var welcome = 'Welcome to my website, <span class="green">'
var endSpan = '</span>';

text = ['I&#39;m not sure simple is always so beautiful.',
		'I&#39;m a freelance designer from the United Kingdom.',
		'I design usable and accessible websites.',
		'I design websites to meet user needs.',
		'I design websites that are good value for money.',
		'I design websites that are standards compliant.',
		'I design websites that are xhtml/css valid.',
		'I design websites that perform in search engines.',
		'I design websites that work in Internet Explorer',
		'I design websites that don&#39;t suck.',];

i = Math.floor(Math.random()*10);

document.getElementById('welcome_banner').innerHTML = welcome + text[i] + endSpan;