function previsualiser()
{
	divNode = document.getElementById('preview');
	divNode.innerHTML = '';
	descriptionVal = document.getElementById('page').value;
	
	descriptionVal = descriptionVal.replace(/\[banniere\]/g, "<a href = 'javascript:alert(\"lien tracké\");'><img src = './Image/banniereDefaut.png' style = 'border : none;' /></a>");
	descriptionVal = descriptionVal.replace(/\[lien\]/g, "javascript:alert(\"lien tracké\");");
	descriptionVal = descriptionVal.replace(/\[new bloc\]/g, '</div></div></div><br /><div class="blockCentre" align="center"><div class="blockHaut" align="center"><div class="blockBas" align="justify">');
		
	code = '<div class="blockCentre" align="center"><div class="blockHaut" align="center"><div class="blockBas" align="justify">' + descriptionVal + '</div></div></div><br /><br />';
	
	divNode.innerHTML = code;
	
}