function input(e) {
   var tbInput = document.getElementById("tbInput”);
   tbInput.value = tbInput.value + e.value;
   }    

function del() {
var tbInput = document.getElementById("tbInput");
tbInput.value = tbInput.value.substr(0,    tbInput.value.length - 1);
}

function load() {
var array = new Array();

while (array.length < 10) {
    var temp = Math.round(Math.random() * 9);
    if (!contain(array, temp)) {
        array.push(temp);
    }
}
for (i = 0; i < 10; i++) {
    var btn = document.getElementById("btn" + i);
    btn.value = array[i];
}
}