function common_GET_HTTP_QueryString(Query_String_Name) {
		 var i, pos, argname, argvalue, queryString, pairs;
		 // get the string following the question mark
		 queryString = location.href.substring(location.href.indexOf("?")+1);
		 
		 //alert("commons.js : queryString=" + queryString);
		 // split parameters into pairs, assuming pairs are separated by ampersands
		 pairs = queryString.split("&");
		 // for each pair, we get the name and the value
				for (i = 0; i < pairs.length; i++) { 
			  pos = pairs[i].indexOf('='); 
			  if (pos == -1) {
			  continue; 
			  }
			  argname = pairs[i].substring(0,pos);
			  argvalue = pairs[i].substring(pos+1); 
			// Replaces "Google-style" + signs with the spaces they represent
			
			
				if (argname == Query_String_Name) {
				   return unescape(argvalue.replace(/\+/g, " "));
				}
			}
			return false;
		}