function rollover(str,i,cur) {
	var img = document.getElementById(str + i);
	var off = img.src;
	img.onmouseover = function () {
		if(i!=cur){
			img.src = "static/img/globalnav_0" + i + "_on.gif";
		}
	}
	img.onmouseout = function () {
		if(i!=cur){
			img.src = off;
		}
	}
}