One Small Example of how to validate a Input box content against a given mask using Javascript. For this example I have picked up “date” as our input for validation…

Code Goes something like this…

var tmpdate= document.getElementById(“passport_expire_date”).value; //Pick the Field Value to Validation
var rgdate= new RegExp(“[0-9]{2}/[0-9]{2}/[0-9]{4}”); //we need to validation date in mm-dd-yyyy format
b=rgdate.test(tmpdate);
if (!b)
{
alert(“Please enter valid Passport expire date”);
document.getElementById(“passport_expire_date”).focus();
return false;
}
tmpdate=tmpdate.split(“/”);
var mydate= new Date;

if ( 1*tmpdate[0]>12 || 1*tmpdate[0]31 || 1*tmpdate[1]2100 || 1*tmpdate[2]= mydate)
{
alert(“Your Passport is expired!!!”);
document.getElementById(“passport_expire_date”).focus();
return false;
}

I hope you all enjoy this piece of code in your web form…

Sumit Gupta