function erase(oj, default_word) {
	if (oj.value == default_word) oj.value = "";
}

function jump(url) {
	location.href = url;
}

function mymail(address1, address2) {
	location.href = "mailto:" + address1 + "@" + address2;
}

function myRound(num) {
	var num_round = (num * 100);
	num_round = Math.round(num_round) / 100;
	return num_round;
}

function myLogout(log_id) {
	var page_url = "logout.php?log_id_c=" + log_id;
	var page_name = "win_logout";
	var page_style="width=100,height=100,resizable=no,scrollbars=no,status=no";
	var win = window.open(page_url,page_name,page_style);
	win.blur();
}
function myBgColor() {
	if(parent.menu.document.bgColor != document.bgColor)
		parent.menu.document.bgColor = document.bgColor;
}