var lines = []; var out = ""; function enter(){ var text = document.getElementById("textbox"); lines.push(text.value); console.log(text.value); console.log(lines); text.value = ""; } function end() { out = JSON.stringify(lines); target = document.getElementById("output"); target.innerText = out; console.log("end"); } /* function onButtonClick() { target = document.getElementById("output"); target.innerText = document.forms.id_form1.id_textBox1.value; //target.innerText = document.id_form1.id_textBox1.value;//これでもOK }*/