function goHist(a) 
{
   history.go(a);      // Go back one.
}



function swap(targetId)
{
	if(document.getElementById)
	{
	target = document.getElementById(targetId);
		if(target.style.display == "none")
		{
		target.style.display = "block";
		}
	else
		{
		target.style.display = "none";
		}
	}

}

function adCalc(form) {
var ok = 0;
var visitors = form.visitors.value;
var pagesize = form.pagesize.value;
var views = form.views.value;
var bandwidth = form.bandwidth.value;

var complete = "It looks like you entered all the information already!  With this calculator, you just enter two of the fields and it solves for the last one.";

var incomplete = "Oops!  It doesn't appear you entered enough information. Please fill in all the values";

if (visitors != "" && pagesize != "" && views !="")       { form.bandwidth.value = ((visitors * views) * pagesize / 1000000); ok++; } // solve for exposures

if (!ok) alert(incomplete);  // they did not enter at all fields

}

function show(rollover){
		eval(rollover + ".style.visibility = 'visible'");
	}
	
	function hide(rollover){
			eval(rollover + ".style.visibility = 'hidden'");
	}

function win(url) {

window.open(url,"","height=500,width=600,left=100,top=80");

}

function win1() {

window.open("howto/outlook2003.swf","","height=500,width=600,left=100,top=80");

}
function win2() {

window.open("howto/express6.swf","","height=500,width=600,left=100,top=80");

}