var tabMenus  = new Array('metiers','marches','qualite');
var tabImages = new Array('carrieres','contact','phototeque');

function hideMenus()
{
	
	for(i=0 ; i<tabMenus.length ; i++)
	{
		document.getElementById(tabMenus[i]+'SousMenu').style.display = 'none';
		document.getElementById(tabMenus[i]).src = 'img_home_haut/'+tabMenus[i]+'.gif';
	}
	for(i=0 ; i<tabImages.length ; i++)
		document.getElementById(tabImages[i]).src = 'img_home_haut/'+tabImages[i]+'.gif';	
}

function initMenu()
{
	for(i=0 ; i<tabMenus.length ; i++)
	{
		document.getElementById(tabMenus[i]).onmouseover = function ()
		{
			hideMenus();
			showObj(this.id+'SousMenu', 1000);
			document.getElementById(this.id).src = 'img_home_haut/roll/'+this.id+'.gif';
		}
	}
	
	for(i=0 ; i<tabImages.length ; i++)
	{
		document.getElementById(tabImages[i]).onmouseover = function ()
		{
			hideMenus();
			document.getElementById(this.id).src = 'img_home_haut/roll/'+this.id+'.gif';
		}
	}
}

//apparition temporisée
var T = '';
function showObj(nomObj, duration)
{
	document.getElementById(nomObj).style.display='block';
	if(duration!='inf')
	{
		clearTimeout(T);
		var href = document.getElementById(nomObj).getElementsByTagName('a');
		for (var i = 0; i < href.length; i++)
			href[i].onmouseover= function (){ showObj(nomObj,duration); }
		T = setTimeout('hideObj("'+nomObj+'");',duration);
	}
}
function hideObj(nomObj)
{
	document.getElementById(nomObj).style.display = 'none';
}