function showImage(){
var theImages = new Array() 

theImages[0] = 'website/banner2.gif'
theImages[1] = 'website/banner1.gif'
theImages[2] = 'website/banner4.gif'
theImages[3] = 'website/banner5.gif'
theImages[4] = 'website/banner5.gif'
theImages[5] = 'website/banner1.gif'
theImages[6] = 'website/banner2.gif'
theImages[7] = 'website/banner4.gif'

var j = 0
var p = theImages.length;
var preBuffer = new Array()
for (i = 0; i < p; i++){
   preBuffer[i] = new Image()
   preBuffer[i].src = theImages[i]
}
var whichImage = Math.round(Math.random()*(p-1));

document.write('<img height=79 width=515 border=0 src="' + theImages[whichImage] + 
'" alt="Across@UoA">');
}

function linkPub(index) {
window.location.href = document.pub.order.options[index].value;
}

function validate()
{
x=document.myForm
at=x.loginName.value.indexOf("@")
if (at == -1)
	{
	alert("Please enter a valid username (email address)")
	return false
	}
}

function findObj(n, d) { //v4.0
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=findObj(n,d.layers[i].document);
  if(!x && document.getElementById) x=document.getElementById(n); return x;
}

function validateForm() { //v4.0
  var i,p,q,nm,test,num,min,max,errors='',args=validateForm.arguments;
  for (i=0; i<(args.length-2); i+=3) { test=args[i+2]; val=findObj(args[i]);
    if (val) { nm=val.name; if ((val=val.value)!="") {
      if (test.indexOf('isEmail')!=-1) { p=val.indexOf('@');
        if (p<1 || p==(val.length-1)) errors+='- '+nm+' must contain an e-mail address.\n';
      } else if (test!='R') {
        if (isNaN(val)) errors+='- '+nm+' must contain a number.\n';
        if (test.indexOf('inRange') != -1) { p=test.indexOf(':');
          min=test.substring(8,p); max=test.substring(p+1);
          if (val<min || max<val) errors+='- '+nm+' must contain a number between '+min+' and '+max+'.\n';
    } } } else if (test.charAt(0) == 'R') errors += '- '+nm+' is required.\n'; }
  } if (errors) { alert('The following error(s) occurred:\n'+errors);
                      document.returnValue = false; }
    else { document.returnValue = confirm ('You are about to submit the form.'); }
}