if (document.getElementById)
document.documentElement.className = 'jsclass'; //hide content for DOM capable browsers


var randomcontentdisplay={
    divholders:new Object(),
    masterclass: "randomcontent",

    init:function(){
        if (!document.getElementById)
            return
        var alldivs=document.getElementsByTagName("div")
        var randomcontentsearch=new RegExp(this.masterclass+"\\s+(group\\d+)", "i") //check for CSS class="randomcontent groupX" (x=integer)
        for (var i=0; i<alldivs.length; i++){
            if (randomcontentsearch.test(alldivs[i].className)){
                if (typeof this.divholders[RegExp.$1]=="undefined") //if array to hold this group of divs doesn't exist yet
                    this.divholders[RegExp.$1]=new Array() //create array first
                    this.divholders[RegExp.$1].push(alldivs[i]) //add this div to the array
            }
        }
    this.showone()
    },

    showone:function(){
        for (group in this.divholders){ //loop thru each array within object
            var chosenOne=Math.floor(Math.random()*this.divholders[group].length) //randomly pick one entry from array
            this.divholders[group][chosenOne].style.display="block" //display content corresponding to the chosen entry
        }
    }
}