function isValid()
{
		if(document.contactus.txtname.value =="")
		{
			document.contactus.txtname.focus();
			alert("Enter Name");
			return false;
		}
		
		if(document.contactus.txtdesig.value=="")
		{
			document.contactus.txtdesig.focus();
			alert("Enter Designation");
			return false;
		}
		
		if(document.contactus.txtcmp_name.value=="")
		{
			document.contactus.txtcmp_name.focus();
			alert("Enter Company name");
			return false;
		}
		
		if(document.contactus.txtcity.value=="")
		{
			document.contactus.txtcity.focus();
			alert("Enter City");
			return false;
		}
		
		if(document.contactus.txtcountry.value=="")
		{
			document.contactus.txtcountry.focus();
			alert("Enter Country");
			return false;
		}
		
		if(document.contactus.txtphone.value=="")
		{
			document.contactus.txtphone.focus();
			alert("Enter Phone number");
			return false;
		}
		
		if(document.contactus.txtemail.value=="")
		{
			document.contactus.txtemail.focus();
			alert("Enter E-Mail ID");
			return false;
		}
		else
		{
			var strErrorMsg = "Enter correct Email ID  " ;
			if (!(/^[\w\.]+@[\w\.]+[\W\.][\w\.]+$/.test(document.contactus.txtemail.value)))
			{
				document.contactus.txtemail.focus();
				alert(strErrorMsg);
			return false;
			}

		}
				
		if(document.contactus.txtmsg.value=="")
		{
			document.contactus.txtmsg.focus();
			alert("Enter Message");
			return false;
		}
		document.contactus.SendMail.value="SendMail";
		document.contactus.submit();
}