function validate()
{
	 
	var flag=true;
	if(document.form1.username.value=="")
	{
		alert("Insert username");
		document.form1.username.focus();
		flag=false;
		return false;
	}
	if(document.form1.password.value=="")
	{
		alert("Insert password");
		document.form1.password.focus();
		flag=false;
		return false;
	}
	if(flag==true)
	{
		document.form1.form_mode.value=1;
		document.form1.action="index.php";
		document.form1.submit();
	}
}