function loadRollovers() {
	MM_preloadImages('/images/mainnav_codes_over.gif', '/images/mainnav_safety_over.gif', '/images/mainnav_training_over.gif', '/images/mainnav_research_over.gif', '/images/mainnav_membership_over.gif');
}
addLoadEvent(loadRollovers);

function openwindow(page, width, height, resizable, scrollbars) {
	param="width="+width+",height="+height+",resizable="+resizable+",scrollbars="+scrollbars
	window.open(page,'',param)
}

function showPDFMessage() {
	window.open('/catalog/help/NeedAdobeReader6.asp','','dependent=yes,width=600,height=230,top=40,left=40,screenY=40,screenX=40,menubar=no,resizable=no,scrollbars=no,status=no,toolbar=no')
}

function addLoadEvent(newOnload) {
	var currOnload = window.onload;
	if (typeof window.onload != 'function')
		window.onload = newOnload;
	else
		window.onload = function() {
			if (currOnload)
				currOnload();
		newOnload();
	}
} 

function switchVisible(objectID)
{
	if (!document.getElementById)
		return;
	document.getElementById(objectID).style.display = (document.getElementById(objectID).style.display != 'none' ? 'none' : '');
}

function hideElement(objectID)
{
	if (!document.getElementById)
		return;
	document.getElementById(objectID).style.display = 'none';
}

function showElement(objectID)
{
	if (!document.getElementById)
		return;
	document.getElementById(objectID).style.display = '';
}

function setElementClass(objectID, className)
{
	if (!document.getElementById)
		return;
	document.getElementById(objectID).className = className;
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var 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];}}
}

function MM_findObj(n, d) { //v4.01
  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=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}