function validateForm(){
    
   if(document.contactform.txtFname.value=="")
   {
        alert("First Name is required field");
	    document.contactform.txtFname.focus();
	    return false;
   } 
   
    if(document.contactform.txtLName.value=="")
	{
	    alert("Last Name is required field");
	    document.contactform.txtLName.focus();
	    return false;
	}
	
   if(document.contactform.TxtEmail.value=="")
	{
	    alert("Email is required field ");
	    document.contactform.TxtEmail.focus();
	    return false;
	}
	else
	{
	if((document.contactform.TxtEmail.value.indexOf("@")==-1)||(document.contactform.TxtEmail.value.indexOf(".")==-1))
		{
			alert("Enter the valid email address");
			document.contactform.TxtEmail.focus();
			return false;
		}
	}
	
    return true; 
   
}