function getQueryVariable(variable) {  
   var query = window.location.search.substring(1);  
   var vars = query.split("&");  
   for (var i=0;i<vars.length;i++) {    
    var pair = vars[i].split("=");    
    if (pair[0] == variable) {      
     return pair[1];    
    }  
   } 
 }
 var pgRecPerPage = getQueryVariable('perPage');
 var pgRecStart = getQueryVariable('recordStart');
 var pgContentGUID = getQueryVariable('contentGUID');
 var pgGroup = getQueryVariable('groupName');