function loadCorrectStyleSheet()
{
    var isPc = (navigator.userAgent.indexOf("Windows") != -1);
    var isMac = (navigator.userAgent.indexOf("Mac") != -1);
    var isNS = (navigator.appName == "Netscape");
    var isIE = ((navigator.userAgent.indexOf("MSIE") != -1));
    var isIE6 = ((navigator.userAgent.indexOf("MSIE 6.") != -1));
    var isIE7 = ((navigator.userAgent.indexOf("MSIE 7.") != -1));

    var headID = document.getElementsByTagName("head")[0];         
    var cssNode = document.createElement('link');

    if(isIE6)
    {
        cssNode.type = 'text/css';
        cssNode.rel = 'stylesheet';
        cssNode.href = './styles/IE6.css';
        cssNode.media = 'screen';
        headID.appendChild(cssNode);
    }
    else if(isIE7)
    {
        cssNode.type = 'text/css';
        cssNode.rel = 'stylesheet';
        cssNode.href = '../styles/IE7.css';
        cssNode.media = 'screen';
        headID.appendChild(cssNode);
    }
    else if(isNS)
    {
        cssNode.type = 'text/css';
        cssNode.rel = 'stylesheet';
        cssNode.href = './styles/Netscape.css';
        cssNode.media = 'screen';
        headID.appendChild(cssNode);
    }
}