function pimsize(imgname,widths,heights)
{ 
    var w; 
    var h; 
    //window.alert(picimg.width); 
    //window.alert(picimg.height); 
    w=imgname.width; 
    h=imgname.height; 
    if(imgname.width>widths)
    { 
        do 
            w=w-1; 
        while (w>widths) ; 

        s=w/imgname.width; 
        //window.alert(s); 
        imgname.width=w; 
        imgname.height=h*s; 
        h=imgname.height 
    } 
    //window.alert(imgname.height); 
    //window.alert(heights); 
    if(imgname.height>heights)
    { 
        do 
            h=h-1; 
        while (h>heights) ; 

        s=h/imgname.height; 
        //window.alert(s); 
        imgname.width=w*s; 
        imgname.height=heights; 
    } 
}