function changePic(src) {
	var mainPic = document.getElementById("mainPic");
	mainPic.src = src;
}


function popup(url) {
	var params = "top=10, left=10, width=634, height=476, status=no, menubar=no, toolbar=no scrollbar=no";
    var mywin = window.open(url, "popup", params);
    mywin.focus();
}