utils.js

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// Returns a string with trailing spaces stripped

function ltrim ( s ){
	return s.replace( /^\s*/, "" )
}

function rtrim ( s ){
	return s.replace( /\s*$/, "" );
}

function trim ( s ){
	return rtrim(ltrim(s));
}



// Checks if a string can be converted to an int without loss of data
function isInt(val){
	if (trim(val)==""){
		return false;
	}
	if (isNaN(val)){
		return false;
	}
	if (val.indexOf(".")>=0){
		return false;
	}
	return true;
}