var navcur=1
var lastNav=-1
var autoslide=-1

function changeView(tabnum)
{
	lastNav = navcur
	navcur = tabnum
	
	$("#slidenav"+lastNav).removeClass()
	$("#slidenav"+navcur).addClass('selected')
	
	$("#slider").animate({ 
		marginLeft: -(922*(tabnum-1))+"px"
	},2500,'',slideDone);
	
	//navcur++;if(navcur>5)navcur=1;
	
	//
	//$("#slider").animate({ 
	//	marginLeft: 0+"px"
	//},120,'',slideDone);
	
}

function slideDone()
{
	//alert('slide done')
	doAutoSlide()
} 

function doAutoSlide()
{
	//called when slide done
	autoslide = navcur;
	autoslide++;
	if(autoslide>5)autoslide=1;
	
	window.setTimeout('changeView('+autoslide+')',5000);
}

function PopupScreenCentre(url,name,width,height,scrollbars) 
{
	var titleBarHeight, windowBorderWidth
	titleBarHeight = 24
	windowBorderWidth = 4

	var screenWidth, screenHeight
	screenWidth = 800
	screenHeight = 600

	if (window.screen) 
	{
		if (window.screen.availWidth) 
		{
			// ok browser has the appropriate properties we need to centre it
			screenWidth = window.screen.availWidth
			screenHeight = window.screen.availHeight
		}
	}

	var windowWidth = windowBorderWidth + width + windowBorderWidth
	var windowHeight = titleBarHeight + height + windowBorderWidth

	var left = (screenWidth - windowWidth) / 2
	var top = (screenHeight - windowHeight) / 2

	window.open(url,name,'left='+left+',top='+top+',screenX='+left+',screenY='+top+',width='+width+',height='+height+',scrollbars=1,resizable=0,toolbar=0,location=0,directories=0,status=0,menubar=0,copyhistory=0')
}

function ImagePopup(filename) 
{
	PopupScreenCentre("attachments/" + filename, "_blank", 780, 550, 0)
}

function changePage(selectObj) 
{
  if(selectObj.selectedIndex!=-1&&selectObj.selectedIndex!=0)
  {
    document.location="page.asp?id="+selectObj.options[selectObj.selectedIndex].value
  }
}