function edit_men()
{
	if(document.f1.name.value=="")
	{
		alert("Please enter the name !");
		document.f1.name.focus();
		return false;
	}
	else if(document.f1.age.value=="")
	{
		alert("Please enter the age !");
		document.f1.age.focus();
		return false;
	}
	else if(isNaN(document.f1.age.value))
	{
		alert("Please enter the valid age !");
		document.f1.age.value="";
		document.f1.age.focus();
		return false;
	}
	else if(document.f1.country.value=="")
	{
		alert("Please select the country !");
		document.f1.country.focus();
		return false;
	}
	else if(document.f1.city.value=="")
	{
		alert("Please enter the city !");
		document.f1.city.focus();
		return false;
	}
}