// Name		    openWindow
//
// Description	Function to open small browser window with no chrome.
//
// Parameters	url   	The destination URL
//              name   	The name of the window
//
// Returns	    Window  Handle to the opened window
//
function openWindow(url, name) {
  var options = "toolbar=yes,location=no,directories=no,status=no,menubar=yes," +
								"scrollbars=yes,resizable=yes";
  return window.open(url, name ,options);
} // openWindow




// Name		    openSizedWindow
//
// Description	Function to open a new browser window with no chrome to a given size.
//
// Parameters	url   	The destination URL
//              name   	The name of the window
//
// Returns	    Window  Handle to the opened window
//
function openSizedWindow(url, name, sizeX, sizeY) {

  var options = "toolbar=no,location=no,directories=no,status=no,menubar=no," +
  				"scrollbars=yes,resizable=yes,width="+sizeX+",height="+sizeY;
  return window.open(url, name, options);

} // openSizedWindow



// Name		    trim
//
// Description	Function to strip beginning and trailing blanks from a string.
//
// Parameters	inString   The string to strip
//
// Returns	    String     Original string minus beginning and trailing spaces
//
function trim(inString) {
  var retVal = "";
  var start = 0;
  while ((start < inString.length) && (inString.charAt(start) == ' ')) {
    ++start;
  }
  var end = inString.length;
  while ((end > 0) && (inString.charAt(end - 1) == ' ')) {
    --end;
  }
	
	if(start < end) retVal = inString.substring(start, end);
	
  return retVal;
} // trim


// Name		    total_amount
//
// Description	Adds up the values of a list of numeric fields and places
//		        total in the first field.  Works with integers and floats.
//
// Parameters	total_field     The field to place the total in
//              sum_fields      List of fields to sum
//
// Returns	    true/false      Success of operation
//
function total_amount(total_field) // variable length parameter list
{
    var total = 0.0;
    var value = 0.0;

    // Loop through arguments 2 and on summing them
    //
    for (var i = 1; i < total_amount.arguments.length; i++) {

        // Attemp to extract floating point value from field
        //
        value = parseFloat(total_amount.arguments[i].value);

        // If a float value was extracted then add it on
        //
        if (!(isNaN(value)))
            total += value;
            
    } // end for

    // Assign total value back to total field and return successful
    //
	total_field.value = total;
	return true;
	
} // total_amount



// Name		    imageBrowser
//
// Description	Allows image browsing/selection/uploading/deletion. 
//				A "browse" button can be put in a form that allows the user to
//				locate an image on their computer, upload it, and select it...
//				having its name be put into a text field on the form.
//              
// Requirements The files image_browse.tpl, image_preview.tpl, and image_upload.tpl must be present.
//              The uploadPath must contain a file named ".upload" to allow uploading.
//
// Parameters	returnForm     The name of the form containing the textfield to populate. 
//              returnField    The field to populate with the image name.
//              uploadPath     The path to upload the image to.  Path MUST be relative to the 
//                             location of the image_ utility files (or absolute).
//              utilityPath    The path to the image_ utility files. Path MUST be relative to the 
//                             location of THIS file (or absolute).
//
// Returns	    true/false      Success of operation
//
function imageBrowser(returnForm, returnField, uploadPath, utilityPath) {
	if( uploadPath.length > 0) {
		if (uploadPath.charAt(uploadPath.length - 1) != '/') {
			uploadPath = uploadPath + '/';
		}
	}
	
	if( utilityPath.length > 0) {
		if (utilityPath.charAt(utilityPath.length - 1) != '/') {
			utilityPath = utilityPath + '/';
		}
	}

	popwin = openSizedWindow( utilityPath + 'image_browse.tpl?returnform=' +returnForm+ '&returnfield=' +returnField+ '&uploadPath=' +uploadPath, 'browseWin', 525, 500);
	
} // browseImage