var clicked=""
var gtype=".gif"
var selstate="_over"
if (typeof(loc)=="undefined" || loc==""){
	var loc=""
	if (document.body&&document.body.innerHTML){
		var tt = document.body.innerHTML.toLowerCase();
		var last = tt.indexOf("discovery.js'");
		if (last>0){
			var first = tt.lastIndexOf("'", last);
			if (first>0 && first<last) loc = document.body.innerHTML.substr(first+1,last-first-1);
		}
	}
}

document.write("<table border='0' cellspacing='0' cellpadding='0'><tr>");
document.write("<td><img src='" + loc + "/librarynet/images/opac/opac_top.gif' width='178' height='20'></td>");
tr(false);
writeButton(loc+"", "../opac/", "/librarynet/images/opac/opac_b1", 178, 20, "Introduction to OPAC", "", 0);
writeButton(loc+"", "../opac/opac_faq.html", "/librarynet/images/opac/opac_b2", 178, 20, "OPAC Frequently Asked Questions", "", 0);
writeButton(loc+"", "../opac/opac_guide.html", "/librarynet/images/opac/opac_b3", 178, 20, "Guide on OPAC", "", 0);
writeOPAC(loc+"", "", "/librarynet/images/opac/opac_b4", 178, 20, "OPAC Search", "_OPAC", 0);
tr(true);
document.write("<td><img src='"+loc+"/librarynet/images/opac/opac_bottom.gif' alt='' width='178' height='20'></td>");
document.write("</tr></table>");

loc="";

function tr(b){if (b) document.write("<tr>");else document.write("</tr>");}

function turn_over(name) {
	if (document.images != null && clicked != name) {
		document[name].src = document[name+"_over"].src;
	}
}

function turn_off(name) {
	if (document.images != null && clicked != name) {
		document[name].src = document[name+"_off"].src;
	}
}

function reg(gname,name)
{
if (document.images)
	{
	document[name+"_off"] = new Image();
	document[name+"_off"].src = loc+gname+gtype;
	document[name+"_over"] = new Image();
	document[name+"_over"].src = loc+gname+"_over"+gtype;
	}
}

function evs(name){ return " onmouseover=\"turn_over('"+ name + "')\" onmouseout=\"turn_off('"+ name + "')\""}

function writeButton(urld, url, name, w, h, alt, target, hsp)
{
	gname = name;
	while(typeof(document[name])!="undefined") name += "x";
	reg(gname, name);
	tr(true);
	document.write("<td>");
	if (alt != "") alt = " alt='" + alt + "' title='"+alt+"'";
	if (target != "") target = " target='" + target + "'";
	if (w > 0) w = " width='"+w+"'"; else w = "";
	if (h > 0) h = " height='"+h+"'"; else h = "";	
	if (url != "") url = " href='" + urld + url + "'";
	
	document.write("<a " + url + evs(name) + target + ">");	
	
	if (hsp == -1) hsp =" align='right'";
	else if (hsp > 0) hsp = " hspace='"+hsp+"'";
	else hsp = "";
	
	document.write("<img src='"+loc+gname+gtype+"' name='" + name + "'" + w + h + alt + hsp + " border='0' /></a></td>");
	tr(false);
}

function writeOPAC(urld, url, name, w, h, alt, target, hsp)
{
	gname = name;
	while(typeof(document[name])!="undefined") name += "x";
	reg(gname, name);
	tr(true);
	document.write("<td>");
	if (alt != "") alt = " alt='" + alt + "' title='" + alt + "'";
	if (target != "") target = " target='" + target + "'";
	if (w > 0) w = " width='"+w+"'"; else w = "";
	if (h > 0) h = " height='"+h+"'"; else h = "";	
	url = " href='javascript:oo()' ";
	
	document.write("<script language='javascript'>function oo(){ opac = window.open('/main_startopac.html', 'opac', 'status=yes,scrollbars=yes,resizable=yes,toolbar=yes'); maximize(opac);}</script><a  href='javascript:oo()' " + evs(name) + ">");
	
	if (hsp == -1) hsp =" align='right'";
	else if (hsp > 0) hsp = " hspace='"+hsp+"'";
	else hsp = "";
	
	document.write("<img src='"+loc+gname+gtype+"' name='" + name + "'" + w + h + alt + hsp + " border='0' /></a></td>");
	tr(false);
}