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Javascript Validation in ASP.net

Posted on 10:19 PM by prajeesh and filed under , ,
Hi friends, here is a simplest way of javascript client side validation for an asp.net registration for ,all you need to do is place this code inside script tag and change thename of Controls to your control names.

function validateregform()
{

if (document.getElementById("<%=txtName.ClientID%>").value=="")
{
alert("Name Field can not be blank");
document.getElementById("<%=txtName.ClientID%>").focus();
return false;
}

if(document.getElementById("<%=txtEmail.ClientID %>").value=="")
{
alert("Email id can not be blank"); document.getElementById("<%=txtEmail.ClientID%>").focus();
return false;
}
var emailPat = /^(\".*\"[A-Za-z]\w*)@(\[\d{1,3}(\.\d{1,3}){3}][A-Za-z]\w*(\.[A-Za-z]\w*)+)$/;
var emailid=document.getElementById("<%=txtEmail.ClientID%>").value;
var matchArray = emailid.match(emailPat);
if (matchArray == null)
{
alert("Your email address seems incorrect. Please try again.");
document.getElementById("<%=txtEmail.ClientID%>").focus();
return false;
}

if(document.getElementById("<%=txtWebURL.ClientID %>").value=="")
{
alert("Web URL can not be blank");
document.getElementById("<%=txtWebURL.ClientID%>").value="http://" document.getElementById("<%=txtWebURL.ClientID%>").focus(); return false;
}
var Url="^[A-Za-z]+://[A-Za-z0-9-_]+\\.[A-Za-z0-9-_%&\?\/.=]+$" ;
var tempURL=document.getElementById("<%=txtWebURL.ClientID%>").value;
var matchURL=tempURL.match(Url); if(matchURL==null)
{
alert("Web URL does not look valid");
document.getElementById("<%=txtWebURL.ClientID%>").focus();
return false;
}

if (document.getElementById("<%=txtZIP.ClientID%>").value=="")
{
alert("Zip Code is not valid");
document.getElementById("<%=txtZIP.ClientID%>").focus();
return false;
}
var digits="0123456789";
var temp;
for (var i=0;i<%=txtzip.clientid%>").value.length;i++)
{
temp=document.getElementById("<%=txtZIP.ClientID%>").value.substring(i,i+1);
if (digits.indexOf(temp)==-1) {
alert("Please enter correct zip code");
document.getElementById("<%=txtZIP.ClientID%>").focus(); return false;
}
} return true;
}
Here validateregform contains four functions to validate name,email,web url and zip code.

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2
Responses to ... Javascript Validation in ASP.net
Anonymous said... April 17, 2008 at 4:02 AM

xellllllllllllllllllllenttttttttttttttttttttt

<<--Cyberm@n-->> said... July 8, 2008 at 7:20 AM

hi
I like it

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