function AddParamToURL(param,value)
{
    var b=false;
	var par=new Array();
	var arr=String(document.location).toLowerCase().split('?');
	var url=arr[0]+'?';

	if (arr[1]){
	arr=arr[1];
	arr=arr.split('&');

	for (x in arr){
		par[x]=arr[x].split('=');
	}
	
	for (x in arr){
		if (par[x][0]!=param)url+=par[x][0]+'='+par[x][1]+'&';
		else {url+=param+'='+value+'&';b=true;}
	}
	
	if (b==false){
		url+=param+'='+value+'&';
	}
	url=url.substring(0,url.length-1);
	}
	else{
		url+=param+'='+value;
	}
	location=url;
//	return url;
}
function getURLVar(urlVarName) {
   var urlHalves = String(document.location).toLowerCase().split('?');
   var urlVarValue = '';
   if(urlHalves[1]){
      var urlVars = urlHalves[1].split('&');
      for(var i=0; i<=(urlVars.length); i++){
         if(urlVars[i]){
            var urlVarPair = urlVars[i].split('=');
            if (urlVarPair[0] && urlVarPair[0] == urlVarName.toLowerCase()) {
               urlVarValue = urlVarPair[1];
            }
         }
      }
   }
   return urlVarValue;
}