var MAXNUM = 10;
var eq = new Array("+","-","*","/");

var rel = 0; // Math.floor(Math.random() * 4);
var l = Math.floor(Math.random() * MAXNUM) + 1;
var r = Math.floor(Math.random() * MAXNUM) + 1;

var answ;

switch(rel) {
case 0 : answ = l + r; break;
case 1 : 
    if (l < r) {
        k = l;
        l = r;
        r = k; 
    }
    answ = l - r;
    break;
case 2 : answ = l * r; break;
case 3 : 
        answ = l * r;
        k = l;
        l = answ;
        answ = k;
    break;
}

answ = '<input name="equ" type="hidden" value="'+answ+'">';
var equation = l + " " + eq[rel] + " " + r + " = ";