// Gestion du menu sous IE / Safari
function hover(obj){
	if ( document.all ){
		balUl = obj.getElementsByTagName('ul');
		if (balUl.length > 0){
			sousMenu = balUl[0].style;
			if (sousMenu.display == 'none' || sousMenu.display == ''){
				sousMenu.display = 'block';
			}
			else{
				sousMenu.display = 'none';
			}
		}	
	}
}

function initialize () {
	setHover();
	alternateImagePresentation();
}

function setHover(){
	tabLI = document.getElementById('menu').getElementsByTagName('li');
	nbLI = tabLI.length;
	for (i=0; i < nbLI; i++){
		tabLI[i].onmouseover = function(){
			hover(this);
		}
		tabLI[i].onmouseout = function(){
			hover(this);
		}
	}
}


// Initialisation de la presentation alternée des images
function alternateImagePresentation() {
	var precedent = -1;
	images = document.getElementsByTagName('img');
	nbPostContent = images.length;
	for ( i=0; i < nbPostContent; i++ ){
		do {
			haut = Math.round(Math.random()*4);
		}
		while (haut == precedent );
		precedent  = haut;
		
		switch (haut) {
			case 0:
				images[i].style.background = 'url(/themes/xiemeart/img/img4.png) no-repeat right bottom';
				break;
			case 1:
				images[i].style.background = 'url(/themes/xiemeart/img/img3.png) no-repeat left top';
				break;
			case 2:
				images[i].style.background = 'url(/themes/xiemeart/img/img2.png) no-repeat left bottom';
				break;
			case 3:
				images[i].style.background = 'url(/themes/xiemeart/img/img1.png) no-repeat left top';
				break;
			case 4:
				images[i].style.background = 'url(/themes/xiemeart/img/img5.png) no-repeat right bottom';
				break;
		}	
	}
}