function fun1()
{
var a=document.button;
var b=document.button;
var c=document.button;

if(a.username.value=="")
{
	{
alert("Please enter username");

a.username.focus();
return false;	
}	
	return true;
}

if(b.password.value=="")
{
	{
	alert("please enter password");
	b.password.focus();
	return false;
}
return true;
}

if(c.user_type.value=="0")
{
	{
	alert("please select user type");
	c.user_type.focus();
	return false;
}
return true;
}

}