function compareProfiles()
{
    var chkProfiles = document.getElementsByName('chkCompareProfile');
    var selectedProfiles = new Array();
    for (i=0; i<chkProfiles.length; i++)
    {
        if (chkProfiles[i].checked)
        {
            selectedProfiles.push(chkProfiles[i].value);
        }
    }
    
    if ((selectedProfiles.length < 2) || (selectedProfiles.length > 4))
    {
        alert('Please select 2-4 profiles, that you wish to compare.');
    }
    else
    {
        var url = compareProfilesUrl
        for (i=0; i<selectedProfiles.length; i++)
        {
            url += selectedProfiles[i] + '|';
        }
        location.href = url;
    }        
}