// Get all TDs in document
var docTD = document.getElementsByTagName('TD');

// Define the IFRAME
var theIframe = document.getElementById('nukewrap-content');

// Find the TD with the greatest height
var i = 0;
var theHeight = 0;

while(i != docTD.length) {
    theTD = docTD[i];

    if(theTD.offsetHeight > theHeight) {
        var theHeight = theTD.offsetHeight;
    }
    i++;
}

// Size the IFRAME
if(theHeight != 0) {
    theIframe.height = theHeight;
}
else {
    theIframe.height = "100%";
}