图片浏览效果

<table border=1 cellspacing=0><tr valign=top> 
<td> 
<img id=big_img width=640 height=480 
onload='if (this.width>640 || this.height>480) if (this.width/this.height>640/480) 

this.width=640; else this.height=480;'> 

<td> 
<img src=一天一天抱大了.JPG 
onclick='big_img.src=this.src' 
onload='if (this.width>140 || this.height>226) if (this.width/this.height>140/226) 

this.width=140; else this.height=226;'> 
<img src=舒兰娟.jpg 
onclick='big_img.src=this.src' 
onload='if (this.width>140 || this.height>226) if (this.width/this.height>140/226) 

this.width=140; else this.height=226;'> 
<img src=PICT0385.jpg 
onclick='big_img.src=this.src' 
onload='if (this.width>140 || this.height>226) if (this.width/this.height>140/226) 

this.width=140; else this.height=226;'> 
</table>