using setInnerXHTMl or FBML to show image with specified height/width

I am trying to show an image of a specified height and width. Heres the code that I am using:

function showpic(var1)
{
    piclink="<span&g开发者_如何学Got;<img src=\""+var1+"\" align=\"bottom\" width=\"400\" 
    height=\"300\" /></span> "; 

    document.getElementById('big_pic').setInnerXHTML(piclink);
}

where var1=absolute link of the image

The problem is, the height/width is getting sanitized (read removed). What can I do ? Please let me know. Thanks.

- ahsan

---

solved using :

myimg = document.getElementById('img_tag');
myimg.setStyle({height: '300px', width: '400px'});

thanks

- ahsan