function sd_setDownloadCheckbox(value) {
	for (var i = 0; i < document.download.length; i++) {
		var o = document.download.elements[i];
		if (o.type == "checkbox" && o.name == "download") {
			o.checked = value;
		}
	}
}

function sd_selectAll() {
	sd_setDownloadCheckbox(true);
}

function sd_unselectAll() {
	sd_setDownloadCheckbox(false);
}