鼠标悬停图片变大

function resize_img1()              {                 var pic = document.all.img1;                 var oldWidth = pic.width;                 var oldHeight = pic.height;                 var newWidth = 100;                 var newHeight = 100;                 pic.width = newWidth;                 pic.height = newHeight;                 pic.onmouseover = function () {                     this.width = oldWidth;                     this.height = oldHeight;                 };                 pic.onmouseout = function () {                     this.width = newWidth;                     this.height = newHeight;                 };             }<script>        resize_img1();       </script>