//if (parent.frames.length > 0) top.location.replace(document.location);  // frame buster!

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;
	}
}