JavaScript Form Validation

 JavaScript Form Validation. JavaScript can be used to validate data in HTML forms


<script type="text/javascript">
function validate_all()
    {
    var frmReg=document.manageadmin;
  
  
  
    if(frmReg.name.value.search(/\S/) == -1)
        {
            alert("Please enter name.");
            frmReg.name.focus();
            return false;
        }
  
  
    if(frmReg.textEmail.value.search(/\S/) == -1)
        {
            alert("Please enter Email.");
            frmReg.textEmail.focus();
            return false;
        }
  

  
  
    if(frmReg.textEmail.value.search(/\S/)!=-1)
                    {
                        var regex = /^[\w-]+(?:\.[\w-]+)*@(?:[\w-]+\.)+[a-zA-Z]{2,7}$/;
                        var temp_email = frmReg.textEmail.value ;
                        if (regex.exec(temp_email)==null)
                            {
                                alert("Invalid email format! Please Enter E-Mail Properly");
                                frmReg.textEmail.focus();
                                frmReg.textEmail.select();
                                return false;
                            }
                    }  
  
             if(frmReg.textTelephone.value.search(/\S/) == -1)
        {
            alert("Please enter telephone number.");
            frmReg.textTelephone.focus();
            return false;
        }
            
            
            
             if(isNaN(frmReg.textTelephone.value))
            {
        alert("Please enter only numbers as your  Telephone number.");
        frmReg.textTelephone.focus();
        return false;
        }
  
 

 
  }
 
 
 
  function reset_all()
    {
  
    var frmReg=document.manageadmin;
   frmReg.reset();
 
   }
</script>


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