function toggle(block){var f;if(document.getElementById){f=document.getElementById(block);}else if(document.all){f=eval("document.all."+block);}
if(!f)return;if(f.style.display.indexOf("none")>=0){f.style.display="";}else if(f.style.display==""){f.style.display="none";}}
function check_usebill(){if(document.checkout.usebill){if(document.checkout.usebill.checked){document.getElementById('billto').style.display="";}else{document.getElementById('billto').style.display="none";}}}
function clkclear(thisfield,dtext){if(thisfield.value==dtext){thisfield.value="";}}
function clkrecall(thisfield,dtext){if(thisfield.value==""){thisfield.value=dtext;}}