function file(fichier) {
	if(window.XMLHttpRequest) // FIREFOX
		xhr_object = new XMLHttpRequest(); 
	else if(window.ActiveXObject) // IE
		xhr_object = new ActiveXObject("Microsoft.XMLHTTP"); 
	else 
          return(false); 
	xhr_object.open("GET", fichier, false); 
	xhr_object.send(null); 
	if(xhr_object.readyState == 4) return(xhr_object.responseText);
		else return(false);
}

function rollover(id) {	
	var hom = $('img_home').getProperty('src');	
	var ent = $('img_entreprise').getProperty('src');
	var off = $('img_offre').getProperty('src');
	var ref = $('img_reference').getProperty('src');
	var par = $('img_partenaire').getProperty('src');
	var con = $('img_contact').getProperty('src');
	
	if(hom.contains('_on')) {
		hom = hom.replace('_on','_off');	
		$('img_home').setProperty('src',hom);
	}
	if(ent.contains('_on')) {
		ent = ent.replace('_on','_off');	
		$('img_entreprise').setProperty('src',ent);
	}
	if(off.contains('_on')) {		
		off = off.replace('_on','_off');	
		$('img_offre').setProperty('src', off);
	}
	if(ref.contains('_on')) {
		ref = ref.replace('_on','_off');	
		$('img_reference').setProperty('src', ref);
	}
	if(par.contains('_on')) {
		par = par.replace('_on','_off');	
		$('img_partenaire').setProperty('src', par);
	}

	if(con.contains('_on')) {	
		con = con.replace('_on','_off');	
		$('img_contact').setProperty('src', con);	
	}
	allum = $(id).getProperty('src');
	allum = allum.replace('_off','_on');
	$(id).setProperty('src',allum);	
}

function changeMenu(id) {
	/*
	$('home').setStyle('display', 'none');
	$('entreprise').setStyle('display', 'none');
	$('offre').setStyle('display', 'none');
	$('reference').setStyle('display', 'none');
	$('partenaire').setStyle('display', 'none');
	$('contact').setStyle('display', 'none');
	$(id).setStyle('display', 'block');
	*/
	$('menu_fond').setStyle('background-image', 'url(img/menu_'+id+'_bg.gif)');
}

function screenOpac() {	
	var bodyElement = $(document.body);
	var myDiv = new Element('div', {    
	    'id': 'div_opac',
		'styles': {
			'position':'absolute', 
			'top':'0', 
			'left':'0', 
			'width':'100%',
			'height':this.getScrollSize().y, 
			'filter':'alpha(opacity=70)', 
			'-moz-opacity':'0.70', 
			'opacity':'0.70', 
			'background-color':'#000000', 
			'z-index':'400',
	        'display': 'block'
    	}		
	});	
	myDiv.inject(bodyElement);	
}

function afficheSponso() {	
	var bodyElement = $(document.body);
	var divSpo = new Element('div', {    
	    'id': 'div_sponso',
		'styles': {
			'position':'absolute', 
			'top':'15px', 
			'left':'50%', 
			'width':'800px', 
			'background-color':'#ffffff', 
			'z-index':'600',
	        'display': 'block',
			'margin-left': '-400px',
			'padding': '10px'
    	}		
	});	
	//divSpo.inject($('div_opac'), 'bottom');
	divSpo.inject(bodyElement);
	var s = file('inc/sponso.php');
	$('div_sponso').set('html', s);
	screenOpac();
}

function closeDiv() {
	$('div_sponso').destroy();
	$('div_opac').destroy();
}