function numbersonly(myfield,e,dec,numbers)
{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(((numbers).indexOf(keychar)>-1))
return true;else if(dec&&(keychar=="."))
{myfield.form.elements[dec].focus();return false;}
else
return false;}