function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		OCSD_San_Clemente_over = newImage("/img/v1/og_disc/OCSD-San-Clemente_over.gif");
		OCSD_Villa_Park_over = newImage("/img/v1/og_disc/OCSD-Villa-Park_over.gif");
		OCSD_John_Wayne_Airport_over = newImage("/img/v1/og_disc/OCSD-John-Wayne-Airport_ove.gif");
		OCSD_Harbor_Patrol_over = newImage("/img/v1/og_disc/OCSD-Harbor-Patrol_over.gif");
		OCSD_Stanton_over = newImage("/img/v1/og_disc/OCSD-Stanton_over.gif");
		OCSD_K_9_N_over = newImage("/img/v1/og_disc/OCSD-K-9-N_over.gif");
		OCSD_northpatrol1 = newImage("/img/v1/og_disc/northpatrol1.gif");
		OCSD_northpatrol2 = newImage("/img/v1/og_disc/northpatrol2.gif");
		OCSD_northpatrol3 = newImage("/img/v1/og_disc/northpatrol3.gif");
		OCSD_northpatrol4 = newImage("/img/v1/og_disc/northpatrol4.gif");
		OCSD_northpatrol5 = newImage("/img/v1/og_disc/northpatrol5.gif");
		OCSD_southpatrol1 = newImage("/img/v1/og_disc/southpatrol1.gif");
		preloadFlag = true;
	}
}










/*javascript for Bubble Tooltips by Alessandro Fulciniti
- http://pro.html.it - http://web-graphics.com */

function enableTooltips(id){
var links,i,h;
if(!document.getElementById || !document.getElementsByTagName) return;
AddCss();
h=document.createElement("span");
h.id="btc";
h.setAttribute("id","btc");
h.style.position="absolute";
document.getElementsByTagName("body")[0].appendChild(h);
if(id==null) links=document.getElementsByTagName("area");
else links=document.getElementById(id).getElementsByTagName("area");
for(i=0;i<links.length;i++){
    Prepare(links[i]);
    }
}

function Prepare(el){
var tooltip,t,b,s,l;
t=el.getAttribute("title");
if(t==null || t.length==0) t="link:";
el.removeAttribute("title");
tooltip=CreateEl("span","tooltip");
s=CreateEl("span","top");
s.appendChild(document.createTextNode(t));
tooltip.appendChild(s);
b=CreateEl("b","bottom");
l=el.getAttribute("id");
if(l.length>0) 
{
    var newimg=document.createElement('img');
        newimg.src="/img/v1/og_disc/" + l;
        newimg.alt=tooltip;
        b.appendChild(newimg);
}
tooltip.appendChild(b);
setOpacity(tooltip);
el.tooltip=tooltip;
el.onmouseover=showTooltip;
el.onmouseout=hideTooltip;
el.onmousemove=Locate;
}

function showTooltip(e){
document.getElementById("btc").appendChild(this.tooltip);
Locate(e);
}

function hideTooltip(e){
var d=document.getElementById("btc");
if(d.childNodes.length>0) d.removeChild(d.firstChild);
}

function setOpacity(el){
el.style.filter="alpha(opacity:95)";
el.style.KHTMLOpacity="0.95";
el.style.MozOpacity="0.95";
el.style.opacity="0.95";
}

function CreateEl(t,c){
var x=document.createElement(t);
x.className=c;
x.style.display="block";
return(x);
}

function AddCss(){
var l=CreateEl("link");
l.setAttribute("type","text/css");
l.setAttribute("rel","stylesheet");
l.setAttribute("href","css/bt.css");
l.setAttribute("media","screen");
document.getElementsByTagName("head")[0].appendChild(l);
}

function Locate(e){
var posx=0,posy=0;
if(e==null) e=window.event;
if(e.pageX || e.pageY){
    posx=e.pageX; posy=e.pageY;
    }
else if(e.clientX || e.clientY){
    if(document.documentElement.scrollTop){
        posx=e.clientX+document.documentElement.scrollLeft;
        posy=e.clientY+document.documentElement.scrollTop;
        }
    else{
        posx=e.clientX+document.body.scrollLeft;
        posy=e.clientY+document.body.scrollTop;
        }
    }
document.getElementById("btc").style.top=(posy+10)+"px";
document.getElementById("btc").style.left=(posx-20)+"px";
}

window.onload=function(){enableTooltips();}