JS_create_elements.js

  var form,
    docfrag,
    formId,
    inputString1,
    inputString2,
    inputNameString1,
    inputNameString2;

    docfrag = document.createDocumentFragment();

    form = document.createElement("form");
    formId = document.createAttribute("id");
    formId.value = 'str-form';
    form.setAttributeNode(formId);

    inputString1 = document.createElement("input");
    inputNameString1 = document.createAttribute("name");
    inputNameString1.value = 'str1';
    inputString1.setAttributeNode(inputNameString1);

    inputString2 = document.createElement("input");
    inputNameString2 = document.createAttribute("name");
    inputNameString2.value = 'str2';
    inputString2.setAttributeNode(inputNameString2);

    form.appendChild(inputString1);
    form.appendChild(inputString2);

    docfrag.appendChild(form);


    document.getElementsByTagName('body')[0].appendChild(docfrag);