var curnav = 1;
function showContainer(num) {

	
		elem = document.getElementById("container" + num);
		prevElem = document.getElementById("container" + curnav);
		prevElem.style.display = "none";
		elem.style.display = "block";
		
		curnav = num;
}

function hideContainer(num) {
		elem.style.display = "none";
		
		curnav = num;
}

<!--
<!--
var curStep = 1;
var steps = new Array();
var d=0;
function init() {
 	steps = document.getElementById("droplist").getElementsByTagName("li");
	d=document;
	if(d.images)
		{ if(!d.MM_p) d.MM_p=new Array();
    		var i,j=d.MM_p.length,a=MM_preloadImages.arguments;
	 		for(i=0; i<a.length; i++)
    		if (a[i].indexOf("#")!=0)
				{ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];
		}
	}
	
	document.getElementById("droplist").style.display = "block";
	
   	
	
}
function step(num) {
	if (num != curStep) {
		elem = document.getElementById("f" + num);
		prevElem = document.getElementById("f" + curStep);
		elem.style.display = "block";
		prevElem.style.display = "none";
		steps[curStep-1].className = "";
		steps[num-1].className = "hi";
		curStep = num;
	}
}
function stepoff(num) {
	curStep = num;
	
}
var curimg = 1;
function stepimg(num) {
	if (num != curimg) {
		elem = document.getElementById("img" + num);
		prevElem = document.getElementById("img" + curimg);
		elem.style.display = "block";
		prevElem.style.display = "none";
		curimg = num;
	}
}