function randomizeContent(classname) {
    var contents = randomizeContent.collectElementbyClass(classname)
    contents.text.sort(function() { return 0.5 - Math.random(); })
    var tbodyref = contents.ref[0].tagName == "TR" ? contents.ref[0].parentNode : new Object()
    for (var i = 0; i < contents.ref.length; i++) {
        if (tbodyref.moveRow) //if IE
            tbodyref.moveRow(0, Math.round(Math.random() * (tbodyref.rows.length - 1)))
        else
            contents.ref[i].innerHTML = contents.text[i]
        contents.ref[i].style.visibility = "visible"
    }
}

randomizeContent.collectElementbyClass = function(classname) { //return two arrays containing elements with specified classname, plus their innerHTML content
    var classnameRE = new RegExp("(^|\\s+)" + classname + "($|\\s+)", "i") //regular expression to screen for classname within element
    var contentobj = new Object()
    contentobj.ref = new Array() //array containing references to the participating contents
    contentobj.text = new Array() //array containing participating contents' contents (innerHTML property)
    var alltags = document.all ? document.all : document.getElementsByTagName("*")
    for (var i = 0; i < alltags.length; i++) {
        if (typeof alltags[i].className == "string" && alltags[i].className.search(classnameRE) != -1) {
            contentobj.ref[contentobj.ref.length] = alltags[i]
            contentobj.text[contentobj.text.length] = alltags[i].innerHTML
        }
    }
    return contentobj
}