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 = '';
	
	if( document.getElementById( field_id + "_name" ) )
	{
		document.getElementById( field_id + "_name" ).innerHTML = "";
		
	}	//end if
}

function clear_link( field_id )
{
	document.getElementById( field_id ).value = '';
	document.getElementById( field_id + '_text' ).innerHTML = '';
	document.getElementById( field_id + '_text' ).style.backgroundColor = '';
}
//assigns a new function to string types
String.prototype.removespaces = removespaces;
String.prototype.trim_spaces = trim_spaces;





function clearImage( formfield, imagepreview )
{
	document.getElementById( formfield ).value = '';
	document.getElementById( formfield + '_filename' ).value = '';
	document.getElementById( imagepreview ).innerHTML = '';
}

/*----------------------
hideHelp()
function to hide the help tips that will display when
a certain field of a form is focussed on.  
----------------------*/
function hideHelp() {
	handle = document.getElementById("helpDisplay"); 
	if( !handle ){
		alert("Cannot find the help display area in the document.");
	}
	else {
		handle.setAttribute("class", "helpDisplayOff"); 
		handle.setAttribute("className", "helpDisplayOff"); 
		handle.innerHTML = "";
	}
	return; 
}



//-------------------------------------------
function removeClassName (elem, className) {
	elem.className = elem.className.replace(className, "").trim();
}
function addCSSClass (elem, className) {
	removeClassName (elem, className);
	elem.className = (elem.className + " " + className).trim();
}
String.prototype.trim = function() {
	return this.replace( /^\s+|\s+$/, "" );
}
function stripedTable() {
	if( document.getElementById && document.getElementsByTagName ) 
	{
		var allTables = document.getElementsByTagName('table');
		if( !allTables ) { return; }

		for( var i = 0; i < allTables.length; i++ )
		{
			if( allTables[i].className.match(/[\w\s ]*stripedTable[\w\s ]*/) )
			{
				var trs = allTables[i].getElementsByTagName("tr");
				for( var j = 0; j < trs.length; j++ )
				{
					removeClassName(trs[j], 'alternateRow');
					addCSSClass(trs[j], 'normalRow');
				}
				for( var k = 0; k < trs.length; k += 2 )
				{
					if( !trs[k].className.match(/[\w\s ]*sectionRow[\w\s ]*/) )
					{
						removeClassName(trs[k], 'normalRow');
						addCSSClass(trs[k], 'alternateRow');
					}
				}
			}
		}
	}
}