【www.gdgbn.com--正则表达式】

<script language="网页特效">
 function c(obj){ return document.getelementbyid(obj);}
 
 if(c("phone").value!="")
    {
        var tel=/^(+)*(d{0,2}-)*((d{3}|d{4})-)*(d{8}|d{7})$/;
        var phone=/^(+)*(d{0,2}-)*0{0,1}(13[0-9]|15[7-9]|153|156|18[7-9])[0-9]{8}$/; 
        if(!phone.test(c("phone").value)&&!tel.test(c("phone").value))
        {
            c("errorphone").innerhtml="电话格式错误";
             c("phone").focus();
            return false;
        }
   
    }
    c("erroremail").innerhtml="";
    if(c("email").value!="")
    {
        var filter=/^w+([-+.]w+)*@w+([-.]w+)*.w+([-.]w+)*$/; 
        if(!filter.test(c("email").value))
        {
            c("erroremail").innerhtml="邮箱格式错误";
            c("email").focus();
            return false;
        }   
    }    
</script>

本文来源：http://www.gdgbn.com/aspjiaocheng/25559/