function open_w(url,w,h) {
	
	leftPos = (screen.width) ? (screen.width - w) / 2: 0;
	topPos = (screen.height) ? (screen.height - h) / 2: 0;
	window.open (url,'','width='+w+',height='+h+',statusbar=no,mainbar=no,toolbar=no,scrollbars=yes,left='+leftPos+',top='+topPos+'');

}

function credits()
{
	LeftPosition = (screen.width) ? (screen.width-300)/2 : 0;
	TopPosition = (screen.height) ? (screen.height-200)/2 : 0;
	window.open ('credits.asp','','width=300,height=200,scrollbars=no,statusbar=no,toolbar=no,mainbar=no,left='+LeftPosition+',top='+TopPosition+'');
}

function ch_idioma() {
	
	switch(document.idiomas.idiomes_form.options[document.idiomas.idiomes_form.selectedIndex].value) {
		case "castella": window.location.href = '../'
						break;
		case "catala": window.location.href = 'catala/';
						break;
		case "angles": window.location.href = 'english/';
						break;
	}
}

function ch_idioma2() {
	
	switch(document.idiomas.idiomes_form.options[document.idiomas.idiomes_form.selectedIndex].value) {
		case "castella": window.location.href = '../'
						break;
		case "catala": window.location.href = '../catala/';
						break;
		case "angles": window.location.href = '../english/';
						break;
	}
}