function iFrameHeight() {  
    var h = 0;  
  
    // Opera  
    if (window.opera)  
    {  
        h = document.getElementById('blockrandom').contentDocument.getElementById('inHeight').offsetHeight + 20;  
        document.getElementById('blockrandom').setAttribute("height",h);  
    }  
  
    // Safari ~ Chrome  
    else if (/WebKit/i.test(navigator.userAgent))  
    {  
        var posVersion = navigator.userAgent.indexOf("WebKit/");  
        var version = navigator.userAgent.substring(posVersion + 7, posVersion + 10);  
        if (parseInt(version) >= 523) // Safari 3+  
        {  
            document.getElementById('blockrandom').style.height = '0px';  
        }  
        else // Safari 1+ or 2+  
        {  
            return document.getElementById('blockrandom').style.height = '152px';  
        }  
        h = document.getElementById('blockrandom').contentDocument.height;  
        document.getElementById('blockrandom').style.height = h + 'px';  
    }  
  
    // FireFox  
    else if (navigator.userAgent.indexOf("Firefox") != -1)  
    {  
        h = document.getElementById('blockrandom').contentDocument.getElementById('inHeight').offsetHeight + 20;  
        document.getElementById('blockrandom').style.height = h + 'px';  
    }  
  
    // IE  
    else if (document.all)  
    {  
        h = document.frames('blockrandom').document.body.scrollHeight;  
        document.all.blockrandom.style.height = h + 20 + 'px';  
    }  
  
    // Misc  
    else  
    {  
        h = document.getElementById('blockrandom').contentDocument.height;  
        document.getElementById('blockrandom').style.height = h + 60 + 'px';  
    }  
}