function valid()
{
	if(document.dataform.name.value=="")
	{
		alert("please enter name");
		document.dataform.name.focus();
		return false;
	}
	if (document.dataform.email.value=="")
	{
		alert("please enter email");
		document.dataform.email.focus();
		return false;
	}
		var emailPat=/^(.+)@(.+)$/;
	
		var matchArray=document.dataform.email.value.match(emailPat);

	if (matchArray==null)
	{
		alert("Email address seems incorrect (check @ and .'s)");
		return false;
	}
	
 	if(document.dataform.cc.value=="")
 	{
 		alert("please enter country code");
		document.dataform.cc.focus();
		return false;
 	}
	if(document.dataform.cc.value.length <2)
	{
		alert(" country code must be 2 digit");
		document.dataform.cc.focus();
		return false;
	}
	if(isNaN(document.dataform.cc.value)==true)
	{
		alert("country code must be Numeric.");
		document.dataform.cc.focus();
		return false;
	}
	/*var ccPat=/^(.+)@(.+)$/ ;
	
		var matchArray=document.dataform.cc.value.match(ccPat);
		document.dataform.cc.focus();

	if (matchArray==null)
	{
		alert("Country code must be start with +.");
		
		return false;
	}*/
	if(document.dataform.ac.value=="")
 	{
 		alert("please enter Area code");
		document.dataform.ac.focus();
		return false;
 	}
	if(document.dataform.ac.value.length < 3)
	{
		alert(" Area code must be 3 digit");
		document.dataform.ac.focus();
		return false;
	}
	if(isNaN(document.dataform.ac.value)==true)
	{
		alert("Area code must be Numeric.");
		document.dataform.ac.focus();
		return false;
	}
	if(document.dataform.phone.value=="")
 	{
 		alert("please enter Phone no.");
		document.dataform.phone.focus();
		return false;
 	}
	if(document.dataform.phone.value.length < 6)
	{
		alert(" Phone no. must be 6 digit");
		document.dataform.phone.focus();
		return false;
	}
	if(document.dataform.phone.value.length > 10)
	{
		alert(" Phone no. must be 10 digit");
		document.dataform.phone.focus();
		return false;
	}
	if(isNaN(document.dataform.phone.value)==true)
	{
		alert("Phone no. must be Numeric.");
		document.dataform.phone.focus();
		return false;
	}
	
	if(document.dataform.S_country.selectedIndex == 0)
	{
			alert("Please select country name");
			document.dataform.S_country.focus();
			return false;
			
	}
	
	if(document.dataform.Description.value==0)
	{
		alert("description is must to fill.");
	document.dataform.Description.focus();
	return false;
	}
	
	location.href = 'thankyou.html';
	return true;
}