/* generate a new random private key */
	coinjs.newPrivkey = function(){
		var x = window.location;
		x += (window.screen.height * window.screen.width * window.screen.colorDepth);
		x += coinjs.random(64);
		x += (window.screen.availHeight * window.screen.availWidth * window.screen.pixelDepth);
		x += navigator.language;
		x += window.history.length;
		x += coinjs.random(64);
		x += navigator.userAgent;
		x += 'coinb.in';
		x += (Crypto.util.randomBytes(64)).join("");
		x += x.length;
		var dateObj = new Date();
		x += dateObj.getTimezoneOffset();
		x += coinjs.random(64);
		x += (document.getElementById("entropybucket")) ? document.getElementById("entropybucket").innerHTML : '';
		x += x+''+x;
		var r = x;
		for(i=0;i<(x).length/25;i++){
			r = Crypto.SHA256(r.concat(x));
		}
		var checkrBigInt = new BigInteger(r);
		var orderBigInt = new BigInteger("fffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364141");
		while (checkrBigInt.compareTo(orderBigInt) >= 0 || checkrBigInt.equals(BigInteger.ZERO) || checkrBigInt.equals(BigInteger.ONE)) {
			r = Crypto.SHA256(r.concat(x));
			checkrBigInt = new BigInteger(r);
		}
		return r;
	}

        /* generate random string */
	coinjs.random = function(length) {
		var r = "";
		var l = length || 25;
		var chars = "!$%^&*()_+{}:@~?><|\./;'#][=-abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890";
		for(x=0;x<l;x++) {
			r += chars.charAt(Math.floor(Math.random() * 62));
		}
		return r;
	}