找开global.js, 找到以下函数:

function addFocusHandlers(elements) {
    for (i=0; i < elements.length; i++) {
        if (elements[i].type != "button" && elements[i].type != "submit" &&
            elements[i].type != "reset" && elements[i].type != "checkbox" && elements[i].type != "radio") {
            if (!elements[i].getAttribute('readonly') && !elements[i].getAttribute('disabled')) {
                elements[i].onfocus=function() {this.style.backgroundColor='#ffd';this.select()};
                elements[i].onmouseover=function() {this.style.backgroundColor='#ffd'};
                // elements[i].onblur=function() {this.style.backgroundColor='';} 就是这一句话使jsp(html)中的onblur事件不能触发
                elements[i].onmouseout=function() {this.style.backgroundColor='';}
            }
        }
    }
}
将其屏蔽掉即可。我还没有发现屏蔽后对系统会有什么样的影响。