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;
}