function clearField( field_name )
{
	document.getElementById( field_name ).value = '';
	document.getElementById( field_name ).style.backgroundColor = '';
}

function highlightFields( field_str )
{
	var fields = field_str.split(',');
	
	for( var i=0; i<fields.length; i++ )
	{
		highlightField( fields[i], '#F6F5CF' ); 
	}
	
}


function highlightField( field_name, field_color )
{
	document.getElementById( field_name ).style.backgroundColor = field_color;
}


function formatCurrency(num) 
{
	num = num.toString().replace(/\$|\,/g,'');
	if(isNaN(num))
	num = "0";
	sign = (num == (num = Math.abs(num)));
	num = Math.floor(num*100+0.50000000001);
	cents = num%100;
	num = Math.floor(num/100).toString();
	if(cents<10)
	cents = "0" + cents;
	for (var i = 0; i < Math.floor((num.length-(1+i))/3); i++)
	num = num.substring(0,num.length-(4*i+3))+','+
	num.substring(num.length-(4*i+3));
	return (((sign)?'':'-') +  num + '.' + cents);
}	//end function

function validate_required_fields(frmName, strTextBoxes)
{
	var oForm = document.getElementById(frmName);
	
	//turn the comma separated list into an array
	var arrBoxes = strTextBoxes.split(",");
	
	error = 0;
	
	//loop thru each box and determine if the text value is empty
	for( var intCount = 0; intCount < arrBoxes.length; intCount++ )
	{
		arrBoxes[intCount] = arrBoxes[intCount].trim_spaces();
		
		//alert( "inCount: " + intCount + " - text box: -->" + arrBoxes[intCount] + "<--" );
		
		var strText = document.getElementById(arrBoxes[intCount]).value;
		
		if( strText.length == 0 )
		{
			error++;
			
		}	//end if
		
	}	//end for loop
	
	//if any errors, then user did not enter all the required fields
	if( error > 0 )
	{
		alert( "Please enter all the required fields." );
		
		valid = false;
		
	}	//end if
	
	else
	{
		valid = true;
		
	}	//end else
	
	return valid;
	
}	//end function

function pop_templates()
{
	window.open('pop_templates.php','admin_pop','width=600,height=400,scrollbars=yes,resizable=yes');	
}

//removes all spaces in a string
function removespaces() 
{
	return this.replace(/.*\S/,'');
	
}	//end function

//trims leading and trailing spaces
function trim_spaces() 
{
	return this.replace(/^\s+/,'').replace(/\s+$/,'');
	
}	//end function

function clear_image( field_id )
{
	document.getElementById( 'pg-' + field_id ).src = 'images/spacer.gif';
	document.getElementById( field_id ).value = '';
	document.getElementById( field_id + '_filename' ).value = '';
}

function clear_link( field_id )
{
	document.getElementById( field_id ).value = '';
	document.getElementById( field_id + '_text' ).innerHTML = '';
	document.getElementById( field_id + '_text' ).style.backgroundColor = '';
}


function isNumeric(sText) {
	var ValidChars = "0123456789.";
	var IsNumber=true;
	var Char;
	for (i = 0; i < sText.length && IsNumber == true; i++) {
		Char = sText.charAt(i); 
		if (ValidChars.indexOf(Char) == -1) {
			IsNumber = false;
		}
	}
	return IsNumber;
}


function showregisterform( field_name ) {
	var checkDiv = document.getElementById("check_fields");
	var creditDiv = document.getElementById("credit_fields");
	var billDiv = document.getElementById("bill_fields");
	setClassName(checkDiv,"hidden");
	setClassName(creditDiv,"hidden");
	setClassName(billDiv,"hidden");
	if( field_name == "check" ) { setClassName(checkDiv,"visible"); }
	else if( field_name == "credit" ) { setClassName(creditDiv,"visible"); }
	else if( field_name == "none" ) { setClassName(billDiv,"visible"); }
}

/**
 * class name functions
 */
function getClassName(element) {
	if( element ) {
		var className = (document.all && document.getElementById ? element.className : element.getAttribute("class"));
		return className;
	}
}
function setClassName(element,style) {
	if( element ) {
		if( document.all && document.getElementById ) element.className=style;
		else element.setAttribute("class", style);
	}
}

/**
 * change tab function
 */
function changeTab(tab_id) {
	var tab_affected;
	if( tab_id > 0 ) {
		tab_affected = tab_id;
	}
	else {
		tab_affected = current_tab;
	}

	if( tab_affected == 1 ) {
		setClassName(document.getElementById('nav'),'bLeftOn');
	}
	else {
		setClassName(document.getElementById('nav'),'bLeftOff');
	}
	for( var n=1; n<=total_tabs; n++ ) {
		var tab_a = document.getElementById('tab_a_'+n);
		var tab_span = document.getElementById('tab_span_'+n);
		var previous_tab_span = document.getElementById('tab_span_'+(n-1));
		var header_bar = document.getElementById('header');
		if( n == tab_affected ) {
			if( tab_affected == total_tabs ) {
				setClassName(tab_a,'gOn');
				setClassName(tab_span,'gRightOn');
				setClassName(header_bar,'header_gold_bar');
				if( previous_tab_span ) {
					setClassName(previous_tab_span,'bOff_gOn');
				}
			}
			else {
				setClassName(tab_a,'bOn');
				setClassName(header_bar,'header_blue_bar');
				if( previous_tab_span ) {
					setClassName(previous_tab_span,'bOff_bOn');
				}
				if( tab_affected == (total_tabs-1) ) {
					setClassName(tab_span,'bOn_gOff');
				}
				else {
					setClassName(tab_span,'bOn_bOff');
				}
			}
		}
		else {
			if( n == total_tabs ) {
				setClassName(tab_a,'gOff');
				setClassName(tab_span,'gRightOff');
			}
			else {
				setClassName(tab_a,'bOff');
				if( n == (total_tabs-1) ) {
					setClassName(tab_span,'bOff_gOff');
				}
				else {
					setClassName(tab_span,'bOff_bOff');
				}
			}
		}
	}
}


/**
 * return tab to original state
 */
function returnTab() {

}

function changeState(){
	
	var country = document.getElementById('cc_country').value;
	
	if( country != '840' ){
		document.getElementById('state').style.display = 'none';
		document.getElementById('province').style.display = 'inline';
	}
	else{
		document.getElementById('province').style.display = 'none';
		document.getElementById('state').style.display = 'inline';
	}
}
//assigns a new function to string types
String.prototype.removespaces = removespaces;
String.prototype.trim_spaces = trim_spaces;