function numbersonly(myfield,e,dec){var key;var keychar;if(window.event)key=window.event.keyCode;else if(e)key=e.which;else return true;keychar=String.fromCharCode(key);if((key==null)||(key==0)||(key==8)||(key==9)||(key==13)||(key==27))return true;else if((("0123456789").indexOf(keychar)> -1))return true;else if(dec &&(keychar==".")){ myfield.form.elements[dec].focus();return false;}else return false;}
function show_idw(idw, arrowtype) {to_show = document.getElementById(idw);arrow = document.getElementById(arrowtype);if (to_show.style.display != "block") {to_show.style.display="block";arrow.innerHTML = "↓ "} else {to_show.style.display="none";arrow.innerHTML = "»"}}