var user_agent = "FF";

var w_avail = 0;
var h_avail = 0;
var width_main = 1024;
var banner_height = 0;
var footer_height = 0;

function init()
{
	maximizeBrowser();
	fullWorkingArea();

	var browserWH = findPageHeight();
	w_avail = browserWH[0];
	h_avail = browserWH[1];
	
	var bg1 = document.getElementById("bg1");
	var bg2 = document.getElementById("bg2");

	var main_body	= document.getElementById("main_body");
	var main_bg		= document.getElementById("main_bg");
	var banner		= document.getElementById("banner");
	banner_height	= banner.clientHeight;
	
	var footer		= document.getElementById("footer");
	footer_height	= footer.clientHeight;
	
	var div_detail	= document.getElementById("div_detail");
	var detail		= document.getElementById("detail");

	var sh, extra = 0, mh = 0;
	
	extra = 4;
	
	if (main_bg)
	{
		main_bg.style.left = 0 + "px";
		main_bg.style.width = w_avail + "px";
	}
	
	main_body.style.left = (w_avail - width_main) / 2 + "px";
	
	sh = div_detail.clientHeight + banner_height + footer_height + extra;
	
	if (sh < h_avail)
		sh = h_avail;
	
	main_body.style.height = sh + "px";
	main_bg.style.height = sh + "px";
	
	bg1.width  = w_avail;
	bg2.width  = w_avail;
	bg1.height = (sh / 2);
	bg2.height = (sh - (sh / 2));
	
	document.body.style.backgroundRepeat = 'no-repeat';

	if (detail && (detail.src.indexOf('home.php') > -1 || detail.src.indexOf('frontpage.php') > -1))
		detail.src = detail.src;
	
}

function repaint(heigth, title)
{
	var bg1 = document.getElementById("bg1");
	var bg2 = document.getElementById("bg2");

	var main_body	= document.getElementById("main_body");
	var main_bg		= document.getElementById("main_bg");
	var div_detail	= document.getElementById("div_detail");
	var detail		= document.getElementById("detail");

	div_detail.style.height = detail.height = heigth + "px";
	
	var fullHeight = heigth + banner_height + footer_height;
	if (fullHeight < h_avail)
	{
		fullHeight = h_avail;
		div_detail.style.height = fullHeight - (banner_height + footer_height) + "px";
		detail.height = fullHeight - (banner_height + footer_height);
	}

	main_body.style.height = fullHeight + "px";
	main_bg.style.height = fullHeight + "px";
	
	bg1.height = (fullHeight / 2);
	bg2.height = fullHeight - (fullHeight / 2);
	document.title = title;
}

/********************  other functions ********************/
function getScrollXY()
{
	var scrOfX = 0, scrOfY = 0;
	if ( typeof( window.pageYOffset ) == 'number' ) 
	{
		//Netscape compliant
		scrOfY = window.pageYOffset;
		scrOfX = window.pageXOffset;
	}
	else if ( document.body && ( document.body.scrollLeft || document.body.scrollTop ) ) 
	{
		//DOM compliant
		scrOfY = document.body.scrollTop;
		scrOfX = document.body.scrollLeft;
	}
	else if ( document.documentElement && ( document.documentElement.scrollLeft || document.documentElement.scrollTop ) ) 
	{
		//IE6 standards compliant mode
		scrOfY = document.documentElement.scrollTop;
		scrOfX = document.documentElement.scrollLeft;
	}
	
	return [ scrOfX, scrOfY ];
}

function findPageHeight()
{
	var winWidth, winHeight, d=document;
	if (typeof window.innerWidth!='undefined') 
	{
		winWidth = window.innerWidth;
		winHeight = window.innerHeight;
	}
	else if ( d.documentElement && typeof d.documentElement.clientWidth!='undefined' && d.documentElement.clientWidth!=0 ) 
	{
		winWidth = d.documentElement.clientWidth;
		winHeight = d.documentElement.clientHeight;
	} 
	else if ( d.body && typeof d.body.clientWidth!='undefined') 
	{
		winWidth = d.body.clientWidth;
		winHeight = d.body.clientHeight;
	}
	
	return [ winWidth, winHeight ];
}

function maximizeBrowser() // called in head section
{
	self.resizeTo(screen.availWidth, screen.availHeight);
	self.moveTo(0, 0);
}

function fullWorkingArea()
{
	var theDoc = document.body;
	theDoc.id = "theDoc";
	theDoc.style.width  = "100%";
	theDoc.style.height = "100%";
}

/********************imgs_protection*************/

function protect_images2(e) 
{
	var msg = "Sorry!!!, Please contact the Administrator.";
	if (e.which == 3) 
	{
		alert(msg);
		return false;
	}
	else return true;
}

function protect_images1() {
	if(document.images) {
	    for(i=0;i<document.images.length;i++) {
			document.images[i].onmousedown = protect_images2;
			document.images[i].onmouseup = protect_images2;
		}
	}
}

/********************* Tim Nha 24/7 *********************/
function _exist(mainStr, pattern)
{
	var isExist = null
	isExist = mainStr.match(pattern)
	if (isExist != null && isExist.length > 0)
		return true
	return false
}

function emailvalidation(entered, alertbox)
{
	var noerr = true
	
	with (entered)
	{
		if (_exist(value, /\s+/g) == true)		
			noerr = false
		if (noerr && value.indexOf("@") == -1)				
			noerr = false
		if (noerr && value.indexOf("@.") > -1)				
			noerr = false
		if (noerr && value.indexOf("@") != value.lastIndexOf("@"))	
			noerr = false
		if (noerr && value.indexOf("@") == value.length-1)		
			noerr = false
		if (noerr && value.indexOf("@") > value.lastIndexOf("."))	
			noerr = false
		if (noerr && value.lastIndexOf(".") == value.length-1)	
			noerr = false
		if (noerr && value.toLowerCase().indexOf("") > -1)	
			noerr = false
	}
	
	if (noerr == false)
	{
		if (alertbox) 
		{
			alert(alertbox);
		}
		entered.focus(); 
	}
	
	return noerr;
}

function valuevalidation(entered, min, max, alertbox, datatype)
{
	with (entered)
	{
		checkvalue=parseFloat(value);
		if (datatype)
		{
			smalldatatype=datatype.toLowerCase();
			if (smalldatatype.charAt(0)=="i") 
				checkvalue=parseInt(value);
		}
		if ((parseFloat(min)==min && checkvalue<min) || (parseFloat(max)==max && checkvalue>max) || value!=checkvalue)
		{
			if (alertbox!="") 
			{
				alert(alertbox);
			}
			entered.focus(); 
			return false;
		}
	}
	return true;
}

function digitvalidation(entered, min, max, alertbox, datatype)
{
	with (entered)
	{
		checkvalue=parseFloat(value);
		if (datatype)
		{
			smalldatatype=datatype.toLowerCase();
			if (smalldatatype.charAt(0)=="i") 
			{
				checkvalue=parseInt(value); 
				if (value.indexOf(".")!=-1) 
					checkvalue=checkvalue+1;
			}
		}
		if ((parseFloat(min)==min && value.length<min) || (parseFloat(max)==max && value.length>max) || value!=checkvalue)
		{
			if (alertbox!="") 
			{
				alert(alertbox); 
			}
			entered.focus(); 
			return false;
		}
	}
	return true;
}

function emptyvalidation(entered, alertbox)
{
	if (entered == null)
		return false;
	
	with (entered)
	{
		if (value == null || value == "")
		{
			if (alertbox!="") 
			{
				alert(alertbox);
			}
			entered.focus(); 
			return false;
		}
	}
	return true;
}

function emptyvalidation_no_msg(entered)
{
	if (entered == null)
		return false;
	
	with (entered)
	{
		if (value == null || value == "")
			return false;
	}
	return true;
}

/*** using form validation ***

create 2 dimension array name form_fields
first col is name, second col is type, third col is first error message

ex.		
var form_fields = new Array(new Array("name", "text", "Please enter your name."),
							new Array("phone", "phone", "You MUST enter 10 integer digits"),
							new Array("fax", "fax", "You MUST enter 10 integer digits"),
							new Array("email", "email", "The e-maill address is invalid."),
							new Array("city", "text", "Please enter your city where you live.")

function formvalidation(thisform) will check from the first cell to the rest

***********************************/

function formvalidation()
{
	var n = form_fields.length;
	var i = 0, j = 0;
	var field_reference_index = -1;
	var at_least_one = false;
	var str_err = "";

	while(true)
	{
		switch(form_fields[i][0])
		{
			case 'phone': case 'fax':
				if (form_fields[i][2] == "0")
				{
					if (!emptyvalidation(document.getElementById(form_fields[i][0]), form_fields[i][1]))
						return false;
					else if (!isCorrectPhoneFormat(document.getElementById(form_fields[i][0]))) 
					{
						alert(form_fields[i][1])
						document.getElementById(form_fields[i][0]).focus(); 
						return false;
					}
				}
				else
				{
					if (field_reference_index == -1)
					{
						field_reference_index = parseInt(form_fields[i][2]);
						str_err = "Please enter your ";
						j = i;
						while (form_fields[j] && form_fields[j][2] == field_reference_index)
						{
							str_err += form_fields[i][3];
							j++;
						}
						str_err += " (at least one of them).";
						
					}
					else if (field_reference_index != parseInt(form_fields[i][2]))
					{
						alert(str_err);
						document.getElementById(form_fields[field_reference_index][0]).focus(); 
						return false;
					}
					
					if (emptyvalidation_no_msg(document.getElementById(form_fields[i][0])))
					{
						if ( !isCorrectPhoneFormat(document.getElementById(form_fields[i][0]))) 
						{
							alert(form_fields[i][1]);
							document.getElementById(form_fields[i][0]).focus(); 
							return false;
						}
						else
							at_least_one = true;
					}
				}
				break;
			case 'email':
				if (form_fields[i][2] == "0")
				{
					if (!emptyvalidation(document.getElementById(form_fields[i][0]), form_fields[i][1]))
						return false;
					else if (!emailvalidation(document.getElementById(form_fields[i][0]), form_fields[i][2])) 
					{
						alert(form_fields[i][1])
						document.getElementById(form_fields[i][0]).focus(); 
						return false;
					}
				}
				else
				{
					if (field_reference_index == -1)
					{
						field_reference_index = parseInt(form_fields[i][2]);
						str_err = "Please enter your ";
						j = i;
						while (form_fields[j] && form_fields[j][2] == field_reference_index)
						{
							str_err += form_fields[i][3];
							j++;
						}
						str_err += " (at least one of them).";
						
					}
					else if (field_reference_index != parseInt(form_fields[i][2]))
					{
						alert(str_err);
						document.getElementById(form_fields[field_reference_index][0]).focus(); 
						return false;
					}
					else if (emptyvalidation_no_msg(document.getElementById(form_fields[i][0])))
					{
						if (!emailvalidation(document.getElementById(form_fields[i][0]), form_fields[i][1])) 
						{
							alert(form_fields[i][1])
							document.getElementById(form_fields[i][0]).focus(); 
							return false;
						}
						else
							at_least_one = true;
					}
				}
				break;
			default:
				if (form_fields[i][2] == "0")
				{
					if (!emptyvalidation(document.getElementById(form_fields[i][0]), form_fields[i][1]))
						return false;
				}
		}
		i++;
		if (i == n)
		{
			if (field_reference_index == -1)
				break;
			else if (at_least_one)
				break;
			else
			{
				alert(str_err);
				document.getElementById(form_fields[field_reference_index][0]).focus(); 
				return false;
			}
		}
	}
	
	return true;
}