问1个关于JS的问题 请指导下

Question

// mail
function ismail(obj)
{
var patrn = /^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$/; 
if (!patrn.test(obj.value) || obj.value=="")
{
document.getElementById(obj.name).className="btn_text_red";
}
else
{
document.getElementById(obj.name).className="btn_text";
}
}function ispassword(obj)
{
//var txt=document.all.ispassword;
if (obj.value=="" || obj.value.length < 6)
{
document.getElementById(obj.name).className="btn_text_red";
}
else
{
document.getElementById(obj.name).className="btn_text";
}
}//重复密码
function isrepassword(obj)
{
//var txt=document.all.isrepassword;
if (obj.value=="" || obj.value != document.form1.password.value)
{
document.getElementById(obj.name).className="btn_text_red";
}
else
{
document.getElementById(obj.name).className="btn_text";
}
}
//验证名子
function isname(obj)
{
//var txt=document.all.isname;
if (obj.value=="" || obj.value.length < 1)
{
document.getElementById(obj.name).className="name_red";
}
else
{
document.getElementById(obj.name).className="name";
}
}
//验证地址
function isaddress(obj)
{
//var txt=document.all.isname;
if (obj.value=="" || obj.value.length < 2)
{
document.getElementById(obj.name).className="btn_text_red";
}
else
{
document.getElementById(obj.name).className="btn_text";
}
}
//验证区号
function isQ(obj)
{
//var txt=document.all.isname;
var patrn=/^[0-9]{1,20}$/;
if (obj.value=="" || !patrn.test(obj.value))
{
document.getElementById(obj.name).className="Q_red";
}
else
{
document.getElementById(obj.name).className="Q";
}
}function isphone(obj,type)
{
//var txt=document.all.isname;
if (type==1)
{
var patrn=/^[0-9]{1,20}$/;
if (obj.value=="" || !patrn.test(obj.value))
{
document.getElementById(obj.name).className="phone_red";
}
else
{
document.getElementById(obj.name).className="phone";
}
}
else if (type==0)
{
if (obj.value=="")
{
document.getElementById(obj.name).className="phone_red";
}
else
{
document.getElementById(obj.name).className="phone";
}
}
}function isales(obj)
{
var patrn=/^[0-9]{1,20}$/;
if (obj.value=="" || !patrn.test(obj.value))
{
document.getElementById(obj.name).className="login_red";
}
else
{
document.getElementById(obj.name).className="login";
}
}function agent(obj)
{
var patrn=/^[0-9]{1,20}$/;
if (obj.sales.value=="" || !patrn.test(obj.sales.value))
{
document.getElementById(obj.sales.name).className="login_red";
var a= false;
}
else
{
document.getElementById(obj.sales.name).className="login";
}

var patrn=/^[0-9]{1,20}$/;  //验证是数字
if (obj.techs.value=="" || !patrn.test(obj.techs.value))
{
document.getElementById(obj.techs.name).className="login_red";
var b= false;
}
else
{
document.getElementById(obj.techs.name).className="login";
}

if (obj.license.value=="" || obj.license.value.length < 2)
{
document.getElementById(obj.license.name).className="btn_text_red";
var c= false;
}
else
{
document.getElementById(obj.license.name).className="btn_text";
}

if (a==false || b==false || c==false)
{
return false;
}
}function agent_1(obj)
{
var patrn=/^[0-9]{1,20}$/;
if (obj.sales_1.value=="" || !patrn.test(obj.sales_1.value))
{
document.getElementById(obj.sales_1.name).className="login_red";
var a= false;
}
else
{
document.getElementById(obj.sales_1.name).className="login";
}

var patrn=/^[0-9]{1,20}$/;
if (obj.techs_1.value=="" || !patrn.test(obj.techs_1.value))
{
document.getElementById(obj.techs_1.name).className="login_red";
var b= false;
}
else
{
document.getElementById(obj.techs_1.name).className="login";
}


if (a==false || b==false)
{
return false;
}
}function pay()
{
 for(i=0;i<formindex.uwAgent.length;i++){
   
 if (formindex.uwAgent[i].checked ==true){
 
 showed1.style.display='none'
     showed2.style.display='block'
 document.formindex.action.value='showed2'
  }else{
    showed1.style.display='block'
showed2.style.display='none'
document.formindex.action.value='showed1'
  }
  }
} function filterInput_ph(){
        var _eventObj=event.srcElement;
        if(!_eventObj) return;
        if(_eventObj.tagName!="INPUT" && _eventObj.type!="text") return;
        
        var r = document.selection.createRange();
        r.text="";
        var _sCurValue=_eventObj.value;
        var _iCurValueLength=_sCurValue.length;
        
        var _iCurPos=getPointPos(_eventObj);
        if(_iCurPos>12) return; 
        
        
        
        if(event.keyCode<48 || event.keyCode>57) {event.keyCode=0;return;}
        
        
} function biaodan(id)
 {
 
 if (id==1)
 {
 
  document.biaodan1.action="?action=modi";
  document.biaodan1.submit();
  }
 
  if (id==2)
  {
  
   document.biaodan1.action="Suppliers_List.asp";
   document.biaodan1.submit();
   }
 
 
 }