has-attribute.js

function hasAttribute(e, a) {
    if(e.hasAttribute) return e.hasAttribute(a);
    var fixAttr = {
        tabindex: 'tabIndex',
        readonly: 'readOnly',
        'for': 'htmlFor',
        'class': 'className',
        maxlength: 'maxLength',
        cellspacing: 'cellSpacing',
        cellpadding: 'cellPadding',
        rowspan: 'rowSpan',
        colspan: 'colSpan',
        usemap: 'useMap',
        frameborder: 'frameBorder',
        contenteditable: 'contentEditable'
    };
    var d = document.createElement("div");
    d.setAttribute("class", "yuanJS");
    var fullSupported = d.className === "yuanJS";
    return  !!e.getAttribute(fullSupported ? a : (fixAttr[a] || a));
}