var pic = new Array();
pic[1] = new Image;
pic[1].src = "images/feeincome_top.jpg"; 
pic[2] = new Image;
pic[2].src = "images/hourglass_top.jpg";
pic[3] = new Image;
pic[3].src = "images/canada_top.jpg";
pic[4] = new Image;
pic[4].src = "images/attention_top.jpg";

function newimage(imgpic) {
				 document.maintop.src = pic[imgpic].src;
}