function changeImage(){
	i=document.charts.pair.selectedIndex;
	j=document.charts.term.selectedIndex;
	curr =document.charts.pair.options[i].value;
	type =document.charts.term.options[j].value;
	filename = '../charts/' + type + curr + '.gif';
	if(navigator.appVersion.charAt(0)>=3){
	img=new Array();
	img[1] = new Image();img[1].src= filename;
		if(type=="mthly_") window.open(filename,"","width=800,height=400,resizable=yes");
		else {
			document.images['img0'].src=img[1].src;
		}
	}
}