window.onload = function () { 
	DetectPopupBlocker.go();
}

var DetectPopupBlocker = {
	win : null,
	
	go : function () {
		this.lockLogin();
		this.win = window.open('/popuptest.html','popup','width=1,height=1,left=0,top=0,scrollbars=no');
		this.detectWindow();	
	},
	
	detectWindow : function () {
		if(!this.win) {
			this.displayError();
		} else {
			// do nothing, the popup makes the next call
		}
	},
	
	detectEvents : function (hasValidEvents) {
		if (hasValidEvents) {
			this.unlockLogin();
		} else {
			this.displayError();
		}
		this.win.close();			
	},
	
	displayError : function () {
		var d = document;
		var body = d.documentElement.getElementsByTagName('BODY');
		var table = document.getElementById('login_pane').getElementsByTagName('TABLE')[0];
		
		var tr = table.insertRow(0);
		var td = tr.insertCell(0);
		td.colSpan = '2';
		td.noWrap = 'true';
		td.className = 'error_list';
		td.innerHTML = '<b>ERROR: Pop-ups for houstonmerc.com Disabled</b>';
		
		tr = table.insertRow(1);
		td = tr.insertCell(0);
		td.colSpan = '2';
		td.noWrap = 'true';
		td.innerHTML = '<ul><li>Please add "houstonmerc.com" to the whitelist of sites allowed to open pop-ups in your browser.</li><li>The HMX platform utilizes pop-up windows to notify users of important trading actions.</li><li>If you have installed the Google, Yahoo, or MSN toolbar, you may also need to click the toolbar pop-up icon to allow pop-ups.</li></ul>';
		
		for (var i=table.rows.length; i>2; i--)
			table.rows[i-1].style.display = 'none';
		document.getElementById("login_pane").style.display = "";
	},
	
	lockLogin : function () {
		document.getElementById("signin_username").disabled = true;
		document.getElementById("signin_password").disabled = true;
		document.getElementById("signin_button").disabled = true;
	},
	
	unlockLogin : function () {
		document.getElementById("login_pane").style.display = "";
		document.getElementById("signin_username").disabled = false;
		document.getElementById("signin_password").disabled = false;
		document.getElementById("signin_button").disabled = false;
	}
}