function hs(x, modhelp, hide_text, show_text) {
    id = "el-" + x;
    c = document.getElementById(id);
    if (modhelp) {
	d = document.getElementById(x);
    }
    if (c.style.display == "none") {
	c.style.display = "block";
	if (modhelp) {
	    d.removeChild(d.childNodes[0]);
	    d.appendChild(document.createTextNode("(" + hide_text + ")"));
	}
    } else {
	c.style.display = "none";
	if (modhelp) {
	    d.removeChild(d.childNodes[0]);
	    d.appendChild(document.createTextNode("(" + show_text + ")"));
	}
    }
}

function hide_show_rows(prefix, from, to, show_style, master, open_text, closed_text) {
    // Make sure prefix is a string
    prefix = "" + prefix;
    for (i=from; i<=to; i++) {
	c = document.getElementById(prefix + i);
	if (c.style.display == "none") {
	    try {
		c.style.display = show_style;
	    } catch(err) {
		c.style.display = "block";
	    }
	} else {
	    c.style.display = "none";
	}
    }
    if (master != "") {
	d = document.getElementById(master);
	if (d) {
	    cn = d.childNodes[0].childNodes[0];
	    if (cn.nodeValue == open_text) {
		cn.nodeValue = closed_text;
	    } else {
		cn.nodeValue = open_text;
	    }
	}
    }
}

function rp_enable(element) {
    thing = document.getElementById(element);
    thing.disabled = false;
}

function rp_disable(element) {
    thing = document.getElementById(element);
    thing.disabled = true;
}

function hs_origins(count, showtext, hidetext) {
    hide_show_rows("os-", 1, count, "inline", "", "1", "0");
    c = document.getElementById("os-button");
    if (c) {
	if (c.value == showtext) {
	    c.value = hidetext;
	} else {
	    c.value = showtext;
	}
    }
}

function validate_del () {
    var num_checked;
    num_checked = $("input.del:checked").length;
    if (num_checked == 0) {
	return true;
    }
    if (num_checked == 1) {
	return confirm("Delete the item?");
    } else {
	return confirm("Delete the " + num_checked + " items?");
    }
}

function del_do_strikethru (cb) {
    if (cb.checked) {
	$("#s_" + cb.name).addClass("to-delete");
    } else {
	$("#s_" + cb.name).removeClass("to-delete");
    }
}