// JavaScript Document
function valid()
{

if(document.form1.txtname.value=="")
{
alert('Enter Name');
document.form1.txtname.focus();
return false
}
if(document.form1.txtemail.value=="")
{
alert('Enter Email Address');
document.form1.txtemail.focus();
return false
}

if(document.form1.txtemail.value!="")
{
	var varpat=/^[A-Za-z][A-Za-z0-9]+([_\.-][A-Za-z0-9]+)*@[A-Za-z0-9]+([_\.-][A-Za-z0-9]+)*\.([A-Za-z]){2,4}$/i;
if(!varpat.test(document.form1.txtemail.value))
{
alert("Enter Valid Email Address");
document.form1.txtemail.focus();
return false;
}
}

if(document.form1.txtmessage.value=="")
{
alert('Enter Message');
document.form1.txtmessage.focus();
return false;
}
}