function replace(str, original, replacement) {
	var result;
	result = "";
	while(str.indexOf(original) != -1) {
	if (str.indexOf(original) > 0)
		result = result + str.substring(0, str.indexOf(original)) + replacement;
	else
		result = result + replacement;
		str = str.substring(str.indexOf(original) + original.length, str.length);
	}
	return result + str;
}

function trim(str) { 
    str.replace(/^\s*/, '').replace(/\s*$/, ''); 
   return str;
}

function split(str,ch)
{
	var ret = new Array();
	var i = 0;
	while(str.indexOf(ch) != -1)
	{
		if (str.indexOf(ch) > 0)
		{
			ret[i] = str.substring(0, str.indexOf(ch));
			str = str.substring(str.indexOf(ch)+ch.length,str.length);
		}
		i++;
	}
	ret[i]=str;
	return ret;
}