function check_install_step_1(form)
{
	var dbhost	 	= 	form.dbhost.value;
	var dbname 		= 	form.dbname.value;
	var dbuser 		= 	form.dbuser.value;
	if ( dbhost=='' )
	{
		alert("Ban phai nhap thong tin SERVER HOST");
		form.dbhost.focus();
		return false;
	}
	else if ( dbname=='' )
	{
		alert("Ban phai nhap thong tin DATABASE NAME");
		form.dbname.focus();
		return false;
	}
	else if ( dbuser=='' )
	{
		alert("Ban phai nhap thong tin DATABASE USERNAME");
		form.adrepass.focus();
		return false;
	}
}

function check_install_step_2(form)
{
	var aduser	 		= 	form.aduser.value;
	var adpass 			= 	form.adpass.value;
	var adretypepass 	= 	form.adretypepass.value;
	var ademail 		= 	form.ademail.value;
	var x 				= 	form.ademail.value;
	var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	if ( aduser=='' )
	{
		alert("Ban phai nhap thong tin ADMIN");
		form.aduser.focus();
		return false;
	}
	else if ( adpass=='' )
	{
		alert("Ban phai nhap thong tin PASSWORD");
		form.adpass.focus();
		return false;
	}
	else if ( adpass!=adretypepass )
	{
		alert("PASSWORD khong dong nhat");
		form.adpass.focus();
		return false;
	}
	else if (!filter.test(x))
	{
		alert("EMAIL khong hop le");
		form.ademail.focus();
		return false;
	}
}

function checkMail(email)
{
	var x = document.forms[0].email.value;
	var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	if (filter.test(x)) alert('YES! Correct email address');
	else alert('NO! Incorrect email address');
}

function askdel()
{
	if (confirm('Are you sure ???'))
	{
		return true;
	}
	else
	{
		return false;
	}
}

function uploadWindow() {
	newwindow=window.open('upload.php','name','height=150,width=400');
	if (window.focus) {newwindow.focus()}
	return false;
}
function close_upload() {
	alert("close");
	ul.img.value="adadadasda";
	this.window.close();
}
function showForm()
{
	var uploadZone = document.getElementById("uploadZone");
	uploadZone.style.display = "";
}