function calcHeight(frameName)
{
    var browserName= navigator.userAgent.toLowerCase();
    
    if(browserName.indexOf("firefox") != -1)
    {
         var the_height= document.getElementById(frameName).contentDocument.documentElement.scrollHeight;
         document.getElementById(frameName).style.height=the_height + 'px';  
    }else if(browserName.indexOf("safari") != -1)
    {
        var f = document.getElementById(frameName) ; 
        f.style.height = '100px' ; 
        var d = (f.contentWindow.document || f.contentDocument); 
        var h = Math.max(d.body.offsetHeight, d.body.scrollHeight) ; 
        h += (document.all)? 60 : 20 ; 
        f.style.height = h+ 'px' ; 
        f.setAttribute("height", h) 

    }else
    {
         var the_height= document.getElementById(frameName).Document.body.scrollHeight;
         document.getElementById(frameName).style.height=the_height + 'px';
    }
}