/*** Helper tips *******************
 
+ multi line string:
    var text = "this is\
        multi-line\
        text";

     OR

    var text  = "this is\n";
    var text += "multyline\n";
    var text += "text\n";

 */

/***********************************
 * get random value
 */
function rand(max){
	return Math.floor(Math.random()*(max+1) );
}