var previousTab = 1;
var previousBlurb = 1;
var links = new Array("insite.htm","technology.htm","inweb.htm","news.htm","contact.htm");

function showBlurb(id) {
	if(!id) id = "1";
	if (id.indexOf("#")==0) id = id.slice(-1); 
	if(previousBlurb) { 
		fadeInOut("blurb"+id, "blurb"+previousBlurb);
		setBackgroundImg(previousBlurb, "closed");
		setBackgroundImg(id, "open");
		document.getElementById("blurb"+ id).style.zIndex = 100;
		document.getElementById("blurb"+ previousBlurb).style.zIndex = 100 - id;
		previousBlurb = id;
	} else {
		previousBlurb = id;
		setOpacity(id, 10);
		document.getElementById("blurb"+ id).style.zIndex = 100;
		setBackgroundImg(id, "open")
		setOpacity("blurb"+ id, 10);
	}
}

function tabHighlight(id) {
	
	if(previousTab) { 
		setOpacity(previousTab, 6);
		setOpacity(id, 10);
		previousTab = id;
	} else {
		previousTab = id;
		setOpacity(id, 10);
	}	
}

function setBackgroundImg (objid, value) {
	
document.getElementById(objid).style.backgroundImage = 'url(picts/'+value+'tab.jpg)';	
	
}

function setOpacity(objid, value) {

	document.getElementById(objid).style.opacity = value/10;
	document.getElementById(objid).style.filter = 'alpha(opacity=' + value*10 + ')'; 
	
}
	var speed = 1;
	var steps = 1;

function fader(step, ini, outi) {
	var st = step; 
	setOpacity(outi,(steps-st)*10/steps);
	setOpacity(ini,st*10/steps);

	if (st < steps) {
		st = st+1; 
		setTimeout('fader('+st+',"'+ ini+'","'+ outi+'")', speed); 
	}	
}

function fadeInOut(inid, outid) {
	
	if(inid != outid)	{	
	//fader(1, inid, outid);	
	document.getElementById(outid).style.visibility = "hidden";
	document.getElementById(inid).style.visibility = "visible";
	}
	else return false;
}


function getPage() {
	if (previous) window.location = links[previous - 1];
}