function autosizefoot(){
    var nTailleView = document.body.clientHeight;
    var nTailleVerif = document.getElementById('bg_gauche_haut').offsetHeight + document.getElementById('middle').offsetHeight;

	if (nTailleView > nTailleVerif) {
		var nTailleMiddle = nTailleView-document.getElementById('bg_gauche_haut').offsetHeight-15;
		document.getElementById('middle').style.height= nTailleMiddle + "px";
	}

    //alert(nTailleView+" - "+nTailleVerif+" - "+nTailleMiddle);
}

function bttn_hover(str, e){
    e.src = str.substring(0,str.lastIndexOf("."),true) + "_over.jpg";
}

function bttn_out(str, e){
    e.src = str;
}