function popup(url) {  
	var w=635;
	var h=500;
	var scroll='no';
	var winl = (screen.width-w)/2;
	var wint = ((screen.height-h)/2)-30;
	var settings  ='height='+h+',';
	settings +='width='+w+',';
	settings +='top='+wint+',';
	settings +='left='+winl+',';
	settings +='scrollbars=yes,';
	settings +='resizable=no,';
	settings +='menubar=0,status=0';
	win=window.open(url,"popup",settings);
	if(parseInt(navigator.appVersion) >= 4){win.window.focus();}
}

function popup2(url) {  
	var w=600;
	var h=600;
	var scroll='no';
	var winl = (screen.width-w)/2;
	var wint = ((screen.height-h)/2)-30;
	var settings  ='height='+h+',';
	settings +='width='+w+',';
	settings +='top='+wint+',';
	settings +='left='+winl+',';
	settings +='scrollbars=no,';
	settings +='resizable=yes,';
	settings +='menubar=0,status=0';
	win=window.open(url,"popup",settings);
	if(parseInt(navigator.appVersion) >= 4){win.window.focus();}
}

function valideSelection() {
	var checkboxes = document.getElementsByName('selection[]');
	var boolChecked = false;
	var i = 0;
	while(i < checkboxes.length && !boolChecked) {
		boolChecked = checkboxes[i].checked;
		i++;
	}
	if(!boolChecked) {
		document.getElementById('avertissement').style.display = 'block';
	}
	return boolChecked;
}