//Checking tlephone
function istelephone(Telephone)
{
  var validChars =". 0123456789";badChar='';

 if (Telephone=="")
 {
         return false;
 }
 if (Telephone.length > 20)
 {
         return false;
 }

 for (i=0; i<Telephone.length;i++)
 {
         badChar = Telephone.charAt(i);
         if(validChars.indexOf(badChar,0) < 0)
         {
                 return false;
         }
 }
 return true;
}
//Checking email;
function isemail(email)
{
         var invalidChars ="/ :,;";atPos=0;periodPos=0;badChar='';

        if (email=="")
        {
                return false;
        }
        if (email.length > 99)
        {
                return false;
        }

        for (i=0; i<invalidChars.length;i++)
        {
                badChar = invalidChars.charAt(i);
                if(email.indexOf(badChar,0)>-1)
                {
                        return false;
                }
        }
        atPos =email.indexOf("@",1)
        if(atPos==-1){
                return false;
        }
        if (email.indexOf("@",atPos+1)>-1){
                return false;
        }
        periodPos = email.indexOf(".",atPos);
        if (periodPos==-1){
                return false;
        }
        if(periodPos+3 > email.length){
                return false;
        }
        return true;
}

// Valid number
function isnum(passedVal)
{
        if (passedVal == "")
        {
                return false;
        }
        for (i=0; i<passedVal.length; i++)
        {
                if(passedVal.charAt(i)< "0")
                {
                        return false;
                }
                if (passedVal.charAt(i)> "9")
                {
                        return false;
                }
        }
        return true;
}