function popupcentree(page,largeur,hauteur,options) 
{     
	var top=(screen.height-hauteur)/2;     
	var left=(screen.width-largeur)/2;     
	window.open(page,"","top="+top+",left="+left+",width="+largeur+",height="+hauteur+","+options); 
}

function formatText(el,tagstart,tagend) 
{
	alert(tagstart);
	
	if (el.setSelectionRange) 
	{
		el.value = el.value.substring(0,el.selectionStart) + tagstart + el.value.substring(el.selectionStart,el.selectionEnd) + tagend + el.value.substring(el.selectionEnd,el.value.length)
	}
	else 
	{
		var selectedText = document.selection.createRange().text;
	
		if (selectedText != "") {
			var newText = tagstart + selectedText + tagend;
			document.selection.createRange().text = newText;
		}
	}
}