function valid1()
{
	var f = document.contf;
	if(f.name.value.search(/\S/)==-1)
	{
		alert("Please Enter Name.");
		f.name.focus();
		return false;
	}
	if(f.city.value.search(/\S/)==-1)
	{
		alert("Please Enter City.");
		f.city.focus();
		return false;
	}
	if(f.country.value=="#")
	{
		alert("Please Select Country.");
		f.country.focus();
		return false;
	}
	if(f.email.value.search(/\S/)==-1)
	{
		alert("Please Enter E-mail.");
		f.email.focus();
		return false;
	}
	if((/^[a-zA-Z0-9._-]+@([a-zA-Z0-9.-]+\.)+[a-zA-Z.]{2,5}$/).exec(f.email.value)==null)
	{
		alert("Please Enter Proper Email.");
		f.email.select();
		return false;
	}
	if(f.phone.value.search(/\S/)==-1)
	{
		alert("Please Enter phone.");
		f.phone.focus();
		return false;
	}
	if((/^[0-9]+$/).exec(f.phone.value)==null)
	{
		alert("Please Enter Numaric Contact Number.");
		f.phone.select();
		return false;
	}
	if(f.comments.value.search(/\S/)==-1)
	{
		alert("Please Enter Comments.");
		f.comments.focus();
		return false;
	}
	if(f.comments.value.length < 15)
	{
		alert("Please Enter min 15 character for Comments.");
		f.comments.select();
		return false;
	}
	if(f.know_us1.value=="#")
	{
		alert("Please Select reference");
		f.know_us1.focus();
		return false;
	}
	if(f.know_us1.value=="other")
	{
		if(f.know_us2.value.search(/\S/)==-1)
		{
		alert("Please Enter reference");
		f.know_us2.focus();
		return false;
		}
	}
}
function change()
{
	if(document.contf.know_us1.value == "other")
	{
	document.getElementById('know_us1').style.display="none";
	document.getElementById('know_us2').style.display="";
	}
}