function getfield(namefield){
	var index;
	var queryString,queryStringFormatted;

	queryString 	= location.search;
	index 		= queryString.indexOf(namefield);
	if (index == -1){
		queryString = "";
	}
	else{
		queryString 	= queryString.substring(index,queryString.length);
		index 		= queryString.indexOf("=")+1;
		queryString 	= queryString.substring(index,queryString.length);
		index 		= queryString.indexOf("&");
		if (index == -1){
			queryString = queryString.substring(0,queryString.length);
		}
		else{
			queryString = queryString.substring(0,index);	
		}
		
		queryStringFormatted = queryString;
		index = queryStringFormatted.indexOf("%20");
		while(index != -1){
			queryStringFormatted = queryStringFormatted.substring(0, index) + " " + queryStringFormatted.substring(index+3, queryStringFormatted.length);
			index = queryStringFormatted.indexOf("%20");
		}
		
		index = queryStringFormatted.indexOf("+");
		while(index != -1){
			queryStringFormatTed = queryStringFormatted.substring(0, index) + " " + queryStringFormatted.substring(index+1, queryStringFormatted.length);
			index = queryStringFormatted.indexOf("+");
		}


		queryString = queryStringFormatted;
	}
		
	return queryString;
}