var b = 1;var c = true;
function fade(){if(document.all);
if(c == true) {b++;}if(b==100) {b--;c = false}
if(b==10) {b++;c = true;}
if(c == false) {b--;}u.width=150 + b;u.height=125 - b;setTimeout("fade()",50);} script>
第二步:把