javaScript 正则表达式验证

function checkDataClude()
    {
      var data = "1234";
       var reCat = /123/gi;
       //alert(reCat.test(data));  
       var match=data.match(reCat);
       if (match.length==0)
       {
       alert("不存在");  
       }
       else
       {
       alert("存在");  
       }
    }
    function getNumStr()
    {
       var str = "a1b2c3d4e5f6g7h8i9j0k";
       var match = str.match(/\d/g);
       var msg = [];
       for(var i = 0; i < match.length; i++)
      {
        msg.push(match[i]);
      }
       alert(msg);//1,2,3,4,5,6,7,8,9,0
    }
     function getStr1()
    {
       var data = "123123,213,12312,312,3,Cat,cat,dsfsdfs,";
       var reCat = /cat/gi;
       var arrMactches = data.match(reCat)
       var msg=[];
       

       for (var i=0;i < arrMactches.length ; i++)
       {
            msg.push (arrMactches[i]);
       }
       alert(msg);//Cat,cat
    }
    function getIndex()
    {
       var str = "a1b2c3d4e5f6g7h8i9j0k";
       var match = /c/gi;
       alert (str.search(match));//4
    }
     function getIndex()
    {
       var str = "a1b2c3d4e5f6g7h8i9j0k";
       var match = /c/gi;
       alert (str.replace(match,"zjw"));//a1b2zjw3d4e5f6g7h8i9j0k
    }
    function splitArray()
    {
      var data = "a=1&b=2&c=3";
       var reCat = /\&/;
       var arrdata = data.split(reCat);

       for (var i = 0; i < arrdata.length; i++)
       {
            alert(arrdata[i]);//
       }
    }
    function regIsDigit(fData)
    {
     var reg = new RegExp("^[0-9]$");
     alert(reg.test(fData));
   }
   function regDataLength(fData)
   {
    var valLength = fData.length;
    var reg = new RegExp("^[\u0391-\uFFE5]$");
    var result = 0;
    for(i=0; i< valLength; i++)
    {
        if(reg.test(fData.charAt(i)))
        {
            result += 2;
        }
        else
        {
            result ++;
        }
    }
    return result;
}
function regIsNumber(fData)
{
    var reg = new RegExp("^[-]?[0-9]+[\.]?[0-9]+$");
    //return reg.test(fData)
     alert(reg.test(fData));
}
function regIsEmail(fData)
    {
        var reg = new RegExp("^[0-9a-zA-Z]+@[0-9a-zA-Z]+[\.]{1}[0-9a-zA-Z]+[\.]?[0-9a-zA-Z]+$");
        return reg.test(fData);
    }
    function regIsPhone(fData)
    {
        var reg = /^(\+86)?(1[0-9]{10})$/;
        return reg.test(fData);
    }