check_symmetry

var checkSyn = function checkSyn (str){		        //Checks a string for open and closed braces, brackets, and parenthesis. However does not check for semi-colon.
	var symbols = {'{':'}','[':']', '(':')'};

	if(~str.length){
		return true;
	}else{
		var start = str[0];
		var end = str[str.length-1];
		for(var k in symbols){
			if(start === k && end === symbols[k] || end === k && start === symbols[k]){
				return checkSyn(str.slice(1,(str.length-1)));
			}else{
				if(start === k && str[1] === symbols[k]){
					return checkSyn(str.slice(2));
				}else if(end === k && str[str.length -1] === symbols[k]){
					return checkSyn(str.slice(str.length-2));
				}
			}
		}
		return false;
	}
};