// Display metric or english specifications table
function showSizeTable(diameter) {
	var tables = document.getElementsByTagName("table");
	for(i=0; i<tables.length; i++) {
		if(tables[i].className != "diameterTable") {
			continue;
		}
		if(tables[i].id == diameter) {
			tables[i].style.display = "block";
		}
		else {
			tables[i].style.display = "none";
		}
	}
	return false;
}