var example_eqn = new Array('3.3r + 9 + 2.7r = 95 + - 11',
	'7 + 2y = 7 - 3y + 0.2y',
	'2v + 22 - 3v = 2 + -1v - 0v', '26 + j = 13 + 13 + j',
	'2(s + 5) = 5(s + 8)',
	'(x + 2)(x - 2) = x^2 + x');

var example_solvf = new Array('x', 'r', 'AUTO', 'AUTO', 'AUTO', 'AUTO', 'AUTO');

var i = Math.floor(Math.random() * example_eqn.length);

function example(){
	var form = document.getElementById('calcForm')
	form.equation.value = example_eqn[i];
	var solvf = form.solvf
	var j;
	for (j = 0; j < solvf.options.length; j++){
		if (solvf.options[j].text == example_solvf[i]){
			solvf.selectedIndex = j;
			break;
		}
	}
	
	i += 1;
	if (i >= example_solvf.length)
		i = 0;
}