Common Javascript Solutions

only number validation

    <script>
function checkForInt(evt)
{
var charCode = ( evt.which ) ? evt.which : event.keyCode;
return ( charCode >= 48 && charCode <= 57 );
}
</script>


 onkeypress="return checkForInt(event)"
--------------------------------------------------

function checknum()
{
if((event.keyCode >=48 )&&(event.keyCode<=57))
{
return true;
}
else
{
alert("Please Enter Only Numeric Values..");
return false ;
}
}


onkeypress="return checknum();"


-------------------------------------------
function checklength(id)
{
if  (id.value.length <11)
{
return chknum();
}
else
{
alert("Mobile Number cant not be greater than 11 Digits:::");
return false;
}
}


-------------------------------------------------
function blank()
{
if(document.getElementById("<%=TextBox1.ClientID %>").value=="")
{
alert("Cant be Blank not be blank!");
document.getElementById("<%=TextBox1.ClientID %>").focus();
return false ;
}
return true;
}







-----------------------------------------------------------------
               Email Validations 
function email()
{


  var at="@"
  var dot="."
  
  var str=document.getElementById("<%=EmailIDTextBox.ClientID%>").value;
  var lstr=str.length;
  var lat=str.indexOf(at);
  var ldot=str.indexOf(dot);
  var pat=/^.+@.+\..{2,3}$/;
  
  if(str.indexOf(at)==-1 ||str.indexOf(at)==0 ||str.indexOf(at)==lstr)
  {
  alert("Invalid EmailId..")
  document.getElementById("<%=EmailIDTextBox.ClientID %>").focus();
  return false;
  }
  if(str.indexOf(dot)==-1||str.indexOf(dot)==0||str.indexOf(dot)==lstr )
  {
  alert("Invalid EmailId..")
  document.getElementById("<%=EmailIDTextBox.ClientID %>").focus();
  return false;
  }
  


return true ;
}


                                   or  

Email Validation

 if(document.getElementById("<%=EmailTextBox.ClientID%>").value=="")

     {

      alert("Please Enter EMail Id....")

      return false; 

     }

     else

      {

      var at="@"

      var dot="."

      var str=document.getElementById("<%=EmailTextBox.ClientID%>").value;

      var lstr=str.length;

      var lat=str.indexOf(at);

      var ldot=str.indexOf(dot);

      var pat=/^.+@.+\..{2,3}$/;

      if(str.indexOf(at)==-1 ||str.indexOf(at)==0 ||str.indexOf(at)==lstr)

      {

      alert("Invalid Email Id.. Please Try Again..")

      return false;

      }

      if(str.indexOf(dot)==-1||str.indexOf(dot)==0||str.indexOf(dot)==lstr )

      {

      alert("Invalid Email Id.. Please Try Again..")

      return false;

      }

     }

                         (both are same)

----------------------------------


function date()
{
if(document.getElementById("<%=.ClientID %>").value=="")
{
alert("Please Select The Date From Calendar");


return false ;
}
return true;
}