?

var a = document.getElementById("aHref");
a.href = '/user';   
//取消<a>标签原先的onclick事件,使<a>标签点击后通过href跳转(因为无法用js跳转)^-^   
a.setAttribute("onclick",'');   
//激发标签点击事件OVER      
a.click("return false");?

document.getElementById("up").setAttribute("onclick","return false;");

document.getElementById("up").style.color = '#ece9db';
 //"up"是一个A标签的ID