function showPicture(src) {
var imgObj = new Image();
imgObj.src = src;
var objw = imgObj.width;
var objh = imgObj.height;
var mcw, mch;
var MaxW = 800;
var MaxH = 700;
if (objw>MaxW)
{
mcw = MaxW / imgObj.width;
objw = MaxW;
objh = objh * mcw;
}
if (objh>MaxH)
{
mch = MaxH / objh;
objw = objw * mch;
objh = MaxH;
}
var wopt = "scrollbars=no,status=no,resizable=no";
wopt += ",width=" + objw;
wopt += ",height=" + objh;
var wbody = "ShowPicture";
wbody += "