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 check_event_cats(checkedOnOff) {
	var cats_div = document.getElementById("event_cat_list");
	var allInputs = cats_div.getElementsByTagName("input");
	
	for(var i=0; i<allInputs.length; i++) {
		var thisCheckbox = allInputs[i];
		if( thisCheckbox.type == "checkbox" ) {
			if( checkedOnOff == 1 ) {
				thisCheckbox.checked = 1;
			} else {
				thisCheckbox.checked = 0;
			}
		}
	}
}

//Hide or show elements on a page
//nodeIds - ID of one or more (separated by "|") elements on a page
//visTo - takes a value of 0 or 1 to set visibility as either none or block (by default)
//visType (optional) - allows override of default block visibility type for other options (e.g. inline, table-row-group, etc.)
function hide_show(nodeIds, visTo, visType)
{
	var nodeIdArr = nodeIds.split("|");
	
	for(i=0; i<nodeIdArr.length; i++) {
		var nodeId = nodeIdArr[i];
		var thisNode = document.getElementById(nodeId);
		
		// check for node's current visibility
		if(visTo == 1) {
			if(visType) {
				if( (visType == "table-row-group" || visType == "table-row") && document.all ) visType = "block";
				thisNode.style.display = visType;
			} else {
				thisNode.style.display = "block";
			}
		} else if(visTo == 0) {
			thisNode.style.display = "none";
		} else { // find node current vis and assume the opposite
			var currVis = thisNode.style.display;
			
			if(currVis) {
				if(currVis == "none")
					thisNode.style.display = ( visType ? visType : "block" );
				else
					thisNode.style.display = "none";
			} else if(thisNode.className == "no_show") {
				thisNode.style.display = ( visType ? visType : "block" );
			} else { // assume element starts as visible
				thisNode.style.display = "none";
			}
		}
	}
}

//assigns a new function to string types
String.prototype.removespaces = removespaces;
String.prototype.trim_spaces = trim_spaces;