function PopImg(img) { 
	image = new Image();
	image.src = img;
	lmax=screen.width-50;
	html = '<HTML><HEAD><TITLE>Image</TITLE></HEAD><BODY style="margin:0;"><IMG SRC="'+img+'" NAME="imageTest" onLoad="lmax=screen.width-50;hmax=screen.height-50;i=document.imageTest;l=i.width;h=i.height;if(l>=lmax){h=(lmax/l)*h;l=lmax};if(h>=hmax)h=hmax;window.resizeTo(l,h);moveTo((lmax-l)/2,0)" onclick="window.close()" style="max-width:'+lmax+'"></BODY></HTML>';
	popupImage = window.open('','','width=200+"px",height=200+"px",scrollbars=no,resizable,status=no');
	popupImage.document.open();
	popupImage.document.write(html);
	popupImage.document.close();
}

// vérification de formulaire
test_text = ""; // à renseigner si on utilise une chaîne de caractère identique pour chaque label de champs obligatoire
test_class = "oblig"; // à renseigner si on identifie les labels par une class css
message_fr = "merci de remplir tous les champs obligatoires";
message_uk = "please complete all the required fields";

function verif_form(langue) {
	formulaire = document.getElementById("renseigne");
	vide = 0;
	for ( var i=0; i<formulaire.getElementsByTagName("label").length; i++ ) {
		element_label = formulaire.getElementsByTagName("label")[i];
		txt_label = element_label.firstChild.nodeValue;
		class_label = element_label.className;
		if ( (test_text != "" && txt_label.indexOf(test_text) != -1) || (test_class != "" && class_label == test_class) ) {
			if ( element_label.getAttribute("htmlFor") || element_label.getAttribute("for") ) {
				if ( document.all ) id_champs = element_label.getAttribute("htmlFor");
				else id_champs = element_label.getAttribute("for");
				champs = document.getElementById(id_champs);
				if ( champs.tagName == "INPUT" && champs.getAttribute("type") == "text" ) {
					if ( champs.value == "" ) vide ++;
				}
				else if ( champs.tagName == "TEXTAREA" && champs.value == "" ) vide ++;
			}
			else {
				if ( element_label.getElementsByTagName("input")[0] ) {
					input_label = element_label.getElementsByTagName("input")[0];
					if ( input_label.getAttribute("type") == "text" && input_label.value == "" ) vide ++;
				}
				else if ( element_label.getElementsByTagName("textarea")[0] && element_label.getElementsByTagName("textarea")[0].value == "" ) vide ++;
			}
		}
	}
	for (var j=0; j<formulaire.getElementsByTagName("select").length; j++ ) {
		liste = formulaire.getElementsByTagName("select")[j];
		for ( var k=0; k<liste.options.length; k++) {
			if ( liste.options[k].selected == true && liste.options[k].value == "" ) vide ++;
		}
	}
	if ( vide != 0 ) {
		if (langue=="fr")alert(message_fr);
		else if (langue=="uk")alert(message_uk);
		return false;
	}
	else {
		return true;
	}
}
