// welcome page
// 04-13-06

var imageFiles = new Array('colorful.png', 'chisel.jpg', 'deco_raised.jpg');
var imageWidths = new Array('272','280','313');
var captions = new Array();
var isSafari = navigator.userAgent.indexOf('Safari') != -1;
var shuffle = Math.round( (imageFiles.length-1) * Math.random());
var fshuff = imageFiles[shuffle];
var wshuff = imageWidths[shuffle];

var cookiePaths = new Array('about','community','events_publications','opportunities','projects_resources');

var img_dir = "img/";

function imgf() {
	var el = document.getElementById('xm0');
	var el2 = document.getElementById('xm1');
	
	var spacer0 = document.getElementById('sm00'); //big
	var spacer1 = document.getElementById('sm01'); //small

	if(wshuff > 315) {
		spacer1.style.display = 'block';
		el.innerHTML = '<img src="'+img_dir+fshuff+'">';
	} else {
		spacer0.style.display = 'block';
		el2.style.display = 'block';
		el2.innerHTML = '<img src="'+img_dir+fshuff+'">';
	}
	
	// sneak in a cookie-wipe while here
	for(i=0;i<cookiePaths.length;i++) {
		if(!isSafari) {document.cookie = "sel=; expires=Wed, 12 Apr 2006 01:01:01 UTC; path=/"+cookiePaths[i]+"/"; }
			else {document.cookie = "sel=; expires=Wed, 12 Apr 2006 01:01:01 UTC; path=/"+cookiePaths[i];}  // ridiculous variation
	}
}

function rand(a, b){
	return (Math.round(Math.random())-0.5); 
} 

function pp(imgStr,SRC) {
        	if (document.images) {
                	eval(imgStr+' = new Image()');
                	eval(imgStr+'.src = "'+SRC+'"');
        	}
	}
	
function dock(img) {
		  var cnum = img.substring(1,2);
		  document.getElementById('xm1').innerHTML = '<img src="/img/0px.gif" height="1" width="275">';
		  document.getElementById('imgContainer').style.display = 'block';
          document.getElementById('imgDetail').style.display = 'block';
		  document.getElementById('imgDetail').innerHTML = '<img src="/img/'+img+'">';
		  document.getElementById('imgCaption').innerHTML = captions[cnum];
}

function hide() {
	imgf();
	document.getElementById('imgContainer').style.display = 'none';
	document.getElementById('imgDetail').style.display = 'none';
}
function swap(imgName,imgObj,layer) {
        	if (document.images) {
                	
                        	document.images[imgName].src = eval(imgObj+".src");
                	}
        	}

 	 DIR="/img/";		

		pp("m1_about", DIR +"m1_about.gif")
		pp("m1_about_on", DIR + "m1_about_on.gif")
		pp("m2_community", DIR +"m2_community.gif")
		pp("m2_community_on", DIR + "m2_community_on.gif")
		pp("m3_events_pubs", DIR +"m3_events_pubs.gif")
		pp("m3_events_pubs_on", DIR + "m3_events_pubs_on.gif")
		pp("m4_opportunities", DIR +"m4_opportunities.gif")
		pp("m4_opportunities_on", DIR + "m4_opportunities_on.gif")
		pp("m5_projects_resources", DIR +"m5_projects_resources.gif")
		pp("m5_projects_resources_on", DIR + "m5_projects_resources_on.gif")