var sss= 1000,cfd = 0, arr = new Array(
'__images/top/a.jpg',
'__images/top/b.jpg',
'__images/top/c.jpg',
'__images/top/d.jpg'), t, j = 0, p = arr.length, preLoad = new Array();
for (i = 0; i < p; i++)
{
	preLoad[i] = new Image();
	preLoad[i].src = arr[i];
}

function rss()
{
	if (document.all)
	{
		document.images.SS.style.filter="blendTrans(duration=cfd)";
		document.images.SS.filters.blendTrans.Apply();
	}
	document.images.SS.src = preLoad[j].src;
	if (document.all)
	{
		document.images.SS.filters.blendTrans.Play();
	}
	j++;
	if(j>(p-1))	return;
	t = setTimeout('rss()', sss);
}
function validatemail(formObj) 
{  
	var fromaddr = formObj.from.value;
	if (emptyField(formObj.from))
	{
		alert("Please enter your email address in the \'From:\' field.");
		return false;
	}
	if ((formObj.from.value.search("@")==-1)||(formObj.from.value.search("[.*]") == -1)) alert("Please enter a valid email address");
	else if (emptyField(formObj.subject)) alert("Please enter a subject.");
	else if (emptyField(formObj.message)) alert("Please enter an email message in the text area.");
	else return true;
	return false;
}
function makemainframe()
{
	if (parent.frames.length > 0) parent.location.href = self.document.location;
}
function isleapyear(year)
{  	// returns true if 'year' is a leap year (multiple of 4):
	if(year/4-Math.floor(year/4)>0)return false;
	else return true;
}
function checkNumber(_value)
{   // checks that _value is numerical:
    var anum=/(^\d+$)|(^\d+\.\d+$)/
    if (anum.test(_value))return true;
    else return false;
}
function changebgcolor(_obj,_color)
{
	_obj.bgColor=_color;
	return true;
}
function emptyField(textObj)
{
	if ((!textObj)||textObj.value.length == 0) return true;
	for (var i=0; i<textObj.value.length; ++i) 
	{
		var ch = textObj.value.charAt(i);
		if (ch != ' ' && ch != '\t') return false;
	}
	return true;
}
function validatepostauction_step1(formObj) 
{   // check fields: title, description,
		// check title for appropriate length/characters:
    if (emptyField(formObj.title))                 alert("Please enter a title for the auction.");
	else if (formObj.title.value.length<5)         alert("Please enter a more descriptive title for the auction.");
		// check description length/values:
	else if (emptyField(formObj.description))            alert("Please enter a description of the item you are trying to sell.");
	else if (formObj.description.value.length<30)        alert("Please enter a better description of the item - your description is too short.");
	else return true;
	return false;
}
function validatepostauction_step2(formObj) 
{   // check fields: title, description,
        // check target price (if selected) is > 0):
	if((!formObj.notarget.checked)&&(!checkNumber(formObj.target.value)))alert("Please enter a numerical value for yout target price.");
		// check delivery option (that one is selected and that areas are entered if appropriate):
	else if((!formObj.deliver[0].checked)&&(!formObj.deliver[1].checked)&&(!formObj.deliver[2].checked))alert("Please select a delivery or pick-up option.");
	else if((!formObj.deliver[1].checked)&&emptyField(formObj.deliveryareas))alert("Please enter your delivery/drop-off area.");
	else if((!formObj.deliver[1].checked)&&(formObj.deliveryareas.value.length<7))alert("Please enter a more descriptive delivery/drop-off area.");
	else return true;
	return false;
}
function validatepostauction_step3(formObj) 
{   // check fields: title, description,
	var username = formObj.email;
	var password = formObj.password;
    var agree    = formObj.readterms.checked;
    if(emptyField(username))alert('Please enter your username (email address)');
	else if((username.value.length<7)||(username.value.search("@")==-1)||(username.value.search("[.*]")==-1)) alert("Please check your username - it appears to be invalid");
	else if((password.value.length<7)||(emptyField(password)))alert('Please enter your password to continue');
	else if(!agree)alert('You must read and agree to the terms of use in order to post your item. If you do not agree, you may not use this site.');
	else return true;
	return false;
}
function CLEAR_TEXT(textObj)
{
	if (textObj.value)textObj.value='';
}
function checkimage(filename)
{   // checks 'filename' to verify that it contains valid extensions (currently .jpeg, .jpg only)
	if((filename.search('.jpeg')==-1)&&(filename.search('.jpg')==-1)) 
	return confirm('The image you selected may not be valid - only JPEG images can be used. Continue?');
	return true;
}
function create_window(url,wdth,hght,name,scrlbr,centerXoffset,centerYoffset) 
{   // can be improved to center vertically:
	if (document.all)
	{
		var xMax = screen.width, yMax = screen.height;
	}
	else
	{
		if (document.layers) var xMax = window.outerWidth, yMax = window.outerHeight;    // else var xMax = 640, yMax=480;
	}
	var centerXset = centerXoffset;
	var centerYset = centerYoffset;
	var xOffset    = ((xMax - wdth)/2)-centerXset;
	var yOffset    = ((yMax - hght)/2)-centerYset;
	var features   = 'width=' + wdth + ',height=' + hght + ',directories=' + 0 + ',location=' + 0 + ',menubar=' + 0 +
                     ',scrollbars=' + scrlbr + ',status=' + 1 + ',toolbar=' + 0 + ',resizable=' + 1 + ',titlebar=' + name +
                     ',screenX=' + xOffset + ',screenY=' + yOffset + ',top=' + yOffset + ',left=' + xOffset;
	var aWindow = window.open (url, name, features);
}
function opendisplaywindow(url,auctionid,wdth,hght,name,scrlbr,centerXoffset,centerYoffset) 
{   // can be improved to center vertically:
	if (document.all)
	{
		var xMax = screen.width, yMax = screen.height;
	}
	else
	{
		if (document.layers) var xMax = window.outerWidth, yMax = window.outerHeight;    // else var xMax = 640, yMax=480;
	}
	var centerXset = centerXoffset;
	var centerYset = centerYoffset;
	var xOffset    = ((xMax - wdth)/2)-centerXset;
	var yOffset    = ((yMax - hght)/2)-centerYset;
	var features   = 'width=' + wdth + ',height=' + hght + ',directories=' + 0 + ',location=' + 0 + ',menubar=' + 0 +
                     ',scrollbars=' + scrlbr + ',status=' + 1 + ',toolbar=' + 0 + ',resizable=' + 1 + ',titlebar=' + 0 +
                     ',screenX=' + xOffset + ',screenY=' + yOffset + ',top=' + yOffset + ',left=' + xOffset;
	url = url + '&auctionid=' + auctionid;
	var aWindow = window.open (url, name, features);
}


// displayed clock functions:
function showclockcounter()
{
	if (!document.layers&&!document.all&&!document.getElementById) return;
	var months  = new makeArray('January','February','March','April','May','June','July','August','September','October','November','December');
	var wdays    = new makeArray('Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday');
	var Digital = new Date();
	var hours   = Digital.getHours();
	var minutes = Digital.getMinutes();
	var seconds = Digital.getSeconds();
	var day     = Digital.getDay()+1;
	var mday    = Digital.getDate();
	var month   = Digital.getMonth();
	var year    = Digital.getYear();
	var ampm    = "pm";
	if (hours<12) ampm  = "am";
	if (hours>12) hours = hours-12;
	if (hours==0) hours = 12;
	if (minutes<=9) minutes = "0" + minutes;
	if (seconds<=9) seconds = "0" + seconds;
	myclock = "<div class=clock>Currently: &nbsp<b>"+hours+":"+minutes+":"
		      +seconds+" "+ampm+"</b> on "+wdays[day]+" "+months[month]+" "+mday+", "+year+"</div>";
//	myclock = "<div class=clock>Currently: &nbsp<b>"+hours+":"+minutes+":"
//		      +seconds+" "+ampm+" "+day+" "+months[month]+"</b></div>";
	if (document.layers)
	{
		document.layers.liveclock.document.write(myclock);
		document.layers.liveclock.document.close();
	}
	else if (document.all) liveclock.innerHTML = myclock;
	else if (document.getElementById) document.getElementById("liveclock").innerHTML = myclock;
	setTimeout("showclockcounter()",1000);
}
function makeArray() 
{
	//alert(makeArray.arguments.length);
	for (i=0; i<makeArray.arguments.length; i++) this[i+1] = makeArray.arguments[i];
}

function validateupdateaccount(formObj) 
{  	// supposed to be the value of the selected month: alert(formObj.dobmonth.selectedIndex);
	if(formObj.status.value=="none")         alert("Please indicate your status (undergraduate, graduate, faculty, etc.)");
	else if((formObj.password.value).length < 7)  alert("Your password must be at least 7 characters long.");
	else if((formObj.password.value).length > 20) alert("Your password must be at most 20 characters long.");
	else if((formObj.password.value)!=(formObj.password2.value)) alert("Your password does not match the confirmation you entered.");
	else if ((formObj.atype[0])&&(emptyField(formObj.address))) alert("Please enter your correct address.");
	else if ((formObj.atype[0])&&(emptyField(formObj.city)))    alert("Please enter your correct city.");
	else if ((formObj.atype[0])&&((formObj.zipcode.value.length<5) || ((formObj.zipcode.value.length==5)&&(!checkNumber(formObj.zipcode.value))) || ((formObj.zipcode.value.length>5)&&( (formObj.zipcode.value.length!=10) || (!checkNumber(formObj.zipcode.value.substring(0,5))) || (!checkNumber(formObj.zipcode.value.substring(6))) || (!((formObj.zipcode.value.charAt(5)=='-')||(formObj.zipcode.value.charAt(5)==' '))))))) alert("Please enter your correct zip code.");
	else if ((formObj.atype[0])&&((emptyField(formObj.phonearea)) || (!checkNumber(formObj.phonearea.value)) || (formObj.phonearea.value.length!=3)))   alert("Please enter your correct area code.");
	else if ((formObj.atype[0])&&((emptyField(formObj.phonefirst))|| (!checkNumber(formObj.phonefirst.value)) || (formObj.phonefirst.value.length!=3))) alert("Please enter your correct phone number.");
	else if ((formObj.atype[0])&&((emptyField(formObj.phonelast)) || (!checkNumber(formObj.phonelast.value)) || (formObj.phonelast.value.length!=4)))   alert("Please enter your correct phone number.");
	else {alert("Thank you. Your information will be submitted now. \n Please be patient while it is processed - repeated \n clicking of the submit button may generate errors.");return true;}
	return false;
}
function check_usphone(phonenumber) 
{ 
//--------------------------------------
// (c) 2003 Peter Kionga-Kamau, 
// http://www.pmkmedia.com 
// no restrictions have been placed on 
// the use of this code
// 
// Overview: this function will validate 
// a US phone number. It may seem 
// trivial, but many people have run 
// into trouble with this problem 
// because of the tendency to use 
// parentheses () and dashes - in the 
// number, making a simple numerical 
// check insufficient. Often, designers 
// must resort to using three separate 
// fields for the number where only one 
// is needed.
// 
// Input: a single string parameter
// Output: boolean true(1) or false(0) 
// 
// The function will return true
// for any alphanumeric string with 
// the following sequence of characters: 
// any number of spaces [optional], a 
// single open parentheses [optional], 3 
// digits (area code), any number of 
// spaces [optional], a single close 
// parentheses [optional], a single dash 
// [optional], any number of spaces 
// [optional], 3 digits, any number of 
// spaces [optional], a single dash 
// [optional], any number of spaces 
// [optional], 4 digits, any number 
// of spaces [optional]. 
// 
//--------------------------------------

if(phonenumber.match(/^[ ]*[(]{0,1}[ ]*[0-9]{3,3}[ ]*[)]{0,1}[-]{0,1}[ ]*[0-9]{3,3}[ ]*[-]{0,1}[ ]*[0-9]{4,4}[ ]*$/)==null) return false; 
return true; 
}