var example_eqn = new Array('6x^2 + 13x + 6 = 0', 'x^2 = 25', '-15x^3 - 36x = -6x^5', 'r^2 = x^2');
var example_solvf = new Array('AUTO', 'AUTO', 'AUTO', 'AUTO', 'r');

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

function example(){
	var form = document.getElementById('equationForm')
	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;
}