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js实现图片等比缩略显示支持IE/FF

<img src="/_New/_cj/myeditor/sysimage/space.gif" class="ewebeditor__script" _ewebeditor_fake_tag="script" _ewebeditor_fake_value="%3Cscript%20language%3D%22javascript%22%3E%20%0D%0Avar%20flag%3Dfalse%3B%20%20%0D%0Afunction%20MyImage(Img)%7B%20%20%0D%0Avar%20image%3Dnew%20Image()%3B%20%20%0D%0Aimage.src%3DImg.src%3B%20%20%0D%0Awidth%3D236%3B%2F%2F%E9%A2%84%E5%85%88%E8%AE%BE%E7%BD%AE%E7%9A%84%E6%89%80%E6%9C%9F%E6%9C%9B%E7%9A%84%E5%AE%BD%E7%9A%84%E5%80%BC%20%0D%0Aheight%3D170%3B%2F%2F%E9%A2%84%E5%85%88%E8%AE%BE%E7%BD%AE%E7%9A%84%E6%89%80%E6%9C%9F%E6%9C%9B%E7%9A%84%E9%AB%98%E7%9A%84%E5%80%BC%20%0D%0Aif(image.width%3Ewidth%7C%7Cimage.height%3Eheight)%7B%2F%2F%E7%8E%B0%E6%9C%89%E5%9B%BE%E7%89%87%E5%8F%AA%E6%9C%89%E5%AE%BD%E6%88%96%E9%AB%98%E8%B6%85%E4%BA%86%E9%A2%84%E8%AE%BE%E5%80%BC%E5%B0%B1%E8%BF%9B%E8%A1%8Cjs%E6%8E%A7%E5%88%B6%20%0D%0Aw%3Dimage.width%2Fwidth%3B%20%0D%0Ah%3Dimage.height%2Fheight%3B%20%0D%0Aif(w%3Eh)%7B%2F%2F%E6%AF%94%E5%80%BC%E6%AF%94%E8%BE%83%E5%A4%A7%3D%3D%3E%E5%AE%BD%E6%AF%94%E9%AB%98%E5%A4%A7%20%0D%0A%2F%2F%E5%AE%9A%E4%B8%8B%E5%AE%BD%E5%BA%A6%E4%B8%BAwidth%E7%9A%84%E5%AE%BD%E5%BA%A6%20%0D%0AImg.width%3Dwidth%3B%20%0D%0A%2F%2F%E4%BB%A5%E4%B8%8B%E4%B8%BA%E8%AE%A1%E7%AE%97%E9%AB%98%E5%BA%A6%20%0D%0AImg.height%3Dimage.height%2Fw%3B%20%0D%0A%0D%0A%7Delse%7B%2F%2F%E9%AB%98%E6%AF%94%E5%AE%BD%E5%A4%A7%20%0D%0A%2F%2F%E5%AE%9A%E4%B8%8B%E5%AE%BD%E5%BA%A6%E4%B8%BAheight%E9%AB%98%E5%BA%A6%20%0D%0AImg.height%3Dheight%3B%20%0D%0A%2F%2F%E4%BB%A5%E4%B8%8B%E4%B8%BA%E8%AE%A1%E7%AE%97%E9%AB%98%E5%BA%A6%20%0D%0AImg.width%3Dimage.width%2Fh%3B%20%0D%0A%20%7D%20%0D%0A%7D%20%0D%0A%7D%20%20%0D%0A%3C%2Fscript%3E"> 
<img src='http://pages.blueidea.com/articleimg/2007/01/1406/preview_b01.jpg' _ewebeditor_ta_src="http%3A%2F%2Fpages.blueidea.com%2Farticleimg%2F2007%2F01%2F1406%2Fpreview_b01.jpg" onload='javascript:MyImage(this);' border='0'>

　　 [Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

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