var imgSrc="images/nav/"
if(document.images){
	image01on=new Image()
	image01on.src=imgSrc+"portfolio_on.gif"
	image02on=new Image()
	image02on.src=imgSrc+"about_on.gif"
	
	image01off=new Image()
	image01off.src=imgSrc+"portfolio_off.gif"
	image02off=new Image()
	image02off.src=imgSrc+"about_off.gif"
}
function changeImages(){
	if(document.images){
		for(var i=0;i<changeImages.arguments.length;i+=2){
			document[changeImages.arguments[i]].src=eval(changeImages.arguments[i+1]+".src")
		}
	}
}