JavaScript检查电话格式与email格式

function checkPhone()
{
if(true)
{
document.getElementById("spanPhone").innerHTML = "<font color='red'></font>";
}
}

function checkEmail()
{
var re=/^/w+([-+.]/w+)*@/w+([-.]/w+)*/./w+([-.]/w+)*$/;
var email = document.getElementById("email").value;
if((!re.test(email))&&(email!=""))
{
document.getElementById("spanEmail").innerHTML = "<font color='red'>请输入邮箱的正确形式！</font>";
document.getElementById("email").value="";
return false;
}
document.getElementById("spanEmail").innerHTML = "<font color='red'></font>";
}