function livepreview(content,num,date,heure){
  if(content.length > 0){
    gras = /__([^__]*)__/gi;
		souligne = /\+\+([^++]*)\+\+/gi;
		italic = /''([^'']*)''/gi;
		quote = /\{\{([^\}\}]*)\}\}/gi;
		url = /\[([^\|]*)\|([^\|]*)(\|([^\]]*))?\]/gi;
		blockquote = /((\n>([^\n]*))+)/gi;
		pre = /((\n ([^\n]*))+)/gi;
		content = content.replace(gras,"<strong>$1</strong>");
		content = content.replace(souligne,"<ins>$1</ins>");
		content = content.replace(italic,"<em>$1</em>");
		content = content.replace(quote,"<q>$1</q>");
		content = content.replace(url,'<a href="$2" hreflang="$4">$1</a>');
		content = content.replace(blockquote,"<blockquote>$1</blockquote>");
		content = content.replace(pre,"<pre>$1</pre>");
    document.getElementById("preview").innerHTML =
    '<p>Pr&eacute;visualisation en direct :</p>'+
    '<div class="comment-number">'+
		'<a href="#c'+num+'">'+
		'<span class="small">#</span>'+
		'<span class="number">'+num+'</span></a>'+
		'</div>'+
	  '<div class="blanc">'+
		'<p class="comment-info">'+
		'Le '+date+' &agrave; '+heure+', par '+
		'<strong><a href="'+document.getElementById("c_site").value+'">'+document.getElementById("c_nom").value+'</a></strong></p>'+
		'<div class="post-content">'+
		content.replace(/\n/g,"<br />")+
		'</div>'+
		'</div>';
  }
  else{
    document.getElementById("preview").innerHTML = '';
  }
}

function clearText(input){
	if (input.defaultValue==input.value) input.value = ''
}

function restoreText(input){
	if (input.value=='') input.value = input.defaultValue
}