function miseEnpageMain(){
	obj = document.getElementById("conteneur");
	var largTotal = document.body.clientWidth-25;
	var largContenu = obj.offsetWidth;
	var margeH = Math.round((largTotal-largContenu)/2);

	var strstyle="";
	strstyle+="<style>\n";
	strstyle+="#conteneur{\n";
	if(margeH>0){
		strstyle+="    margin-left: "+margeH+"px;\n";
		strstyle+="    margin-right: "+margeH+"px;\n";
	}
	strstyle+="}\n";
	
	strstyle+="</style>\n";
	document.write(strstyle);
}