[{"Identifier":"1","Label":"10 Day","Categories":"Standard","UpdatedBy":"Lno","UpdatedAt":"01-02-2013","RefId":"0","ComType":"1","Cs":["944"],"AM":"Error 
Message","Message":"asdfasdf","Combiner":[{"uniqueID":"1","type":"7","rule":""}]}]
I am accessing it thorugh a js object var myArrayVar=JSON.parse(document.getElementById("populateDT").innerHTML);

for( var  i=0; i<=myArrayVar.length;i++){
            for(var j=0; j<=myArrayVar.Combiner.length; j++){
                var sessionUniqueId= myArrayVar.Combiner[j].uniqueID;
                alert(sessionUniqueId);
                var sessionType=myArrayVar.Combiner[j].type;
                alert(sessionType);
                var sessionRule=myArrayVar.Combiner[j].rule;
                alert(sessionRule);
            }
        }