String.prototype.trim = function()
{
    return this.replace(/^\s+|\s+$/g, "");
} 

function StringBuilder() 
{ 
	this.sb = []; 
} 

StringBuilder.prototype.append = function append(string) 
{ 
	this.sb.push(string); 
	return this; 
}; 

StringBuilder.prototype.toString = function toString() 
{ 
	return this.sb.join(""); 
};

/* example usage 

var sb = new StringBuilder();
	
sb.append("<td class='photo-col' align='center' valign='top'>\n");
sb.append("  &nbsp;");
sb.append("</td>");

return sb.toString();

*/