window.onload = function loadTabs()
{
	// set classes on load
	if( document.getElementById('tab1') )
	{
		document.getElementById('tab1').className='curr';
		if( document.getElementById('tabBtm1') )
		{
			document.getElementById('tabBtm1').className='curr';
		}
		if( document.getElementById('tab5') )
		{
			document.getElementById('tab5').className='end';
			if( document.getElementById('tabBtm5') )
			{
				document.getElementById('tabBtm5').className='end';
			}
		}
		else if( !document.getElementById('tab5') && document.getElementById('tab4') )
		{
			document.getElementById('tab4').className='end';
			if( document.getElementById('tabBtm4') )
			{
				document.getElementById('tabBtm4').className='end';
			}
		}
		else
		{
			document.getElementById('tab3').className='end';
			if( document.getElementById('tabBtm3') )
			{
				document.getElementById('tabBtm3').className='end';
			}
			if( document.getElementById('tab3next') )
			{
				document.getElementById('tab3next').className='hide';
			}
		}
	}
}

function changeTabs(id)
{
	// set class names on div tab elements
	document.getElementById('tab1').className='';
	document.getElementById('tab2').className='';
	document.getElementById('tab3').className='';
	if( document.getElementById('tab5') )
	{
		document.getElementById('tab4').className='';
		document.getElementById('tab5').className='end';
	}
	else if( !document.getElementById('tab5') && document.getElementById('tab4') )
	{
		document.getElementById('tab4').className='end';
	}
	else
	{
		document.getElementById('tab3').className='end';
	}
	document.getElementById('tab'+Number(id)).className = 'curr';

	// set class name on previous div tab
	if( (Number(id)-1) > 0 )
	{
		document.getElementById('tab'+(Number(id)-1)).className = "prev";
	}

	// set class on ending div tab
	if( !document.getElementById('tab'+(Number(id)+1)) )
	{
		document.getElementById('tab'+Number(id)).className = "currEnd";
	}

	// hide content divs
	document.getElementById('tab1content').style.display='none';
	document.getElementById('tab2content').style.display='none';
	document.getElementById('tab3content').style.display='none';
	if( document.getElementById('tab4content') )
	{
		document.getElementById('tab4content').style.display='none';
	}
	if( document.getElementById('tab5content') )
	{
		document.getElementById('tab5content').style.display='none';
	}

	// show current content div
	document.getElementById('tab'+Number(id)+'content').style.display = 'block';
}

function changeTabsBtm(id)
{
	// set class names on div tab elements
	document.getElementById('tabBtm1').className='';
	document.getElementById('tabBtm2').className='';
	document.getElementById('tabBtm3').className='';
	if( document.getElementById('tabBtm5') )
	{
		document.getElementById('tabBtm4').className='';
		document.getElementById('tabBtm5').className='end';
	}
	else if( !document.getElementById('tabBtm5') && document.getElementById('tab4') )
	{
		document.getElementById('tabBtm4').className='end';
	}
	else
	{
		document.getElementById('tabBtm3').className='end';
	}
	document.getElementById('tabBtm'+Number(id)).className = 'curr';

	// set class name on previous div tab
	if( (Number(id)-1) > 0 )
	{
		document.getElementById('tabBtm'+(Number(id)-1)).className = "prev";
	}

	// set class on ending div tab
	if( !document.getElementById('tabBtm'+(Number(id)+1)) )
	{
		document.getElementById('tabBtm'+Number(id)).className = "currEnd";
	}

	// hide content divs
	document.getElementById('tab1content').style.display='none';
	document.getElementById('tab2content').style.display='none';
	document.getElementById('tab3content').style.display='none';
	if( document.getElementById('tab4content') )
	{
		document.getElementById('tab4content').style.display='none';
	}
	if( document.getElementById('tab5content') )
	{
		document.getElementById('tab5content').style.display='none';
	}

	// show current content div
	document.getElementById('tab'+Number(id)+'content').style.display = 'block';
}

function openWin(url,winname,w,h)
{
	window.open(url,winname,'toolbar=0,resizable=1,location=0,menubar=0,scrollbars=1,status=0,directories=0,left='+((screen.width/2)-250)+',width='+w+',height='+h);
}

function toggleDiv(div)
{
	if(document.getElementById(div).style.display=='none')
	{
		document.getElementById(div).style.display='block';
	}
	else
	{
		document.getElementById(div).style.display='none';
	}
}