// Removes leading whitespaces
	function ltrim( value ) {
		
		var re = /\s*((\S+\s*)*)/;
		return value.replace(re, "$1");
		
	}
	
	// Removes ending whitespaces
	function rtrim( value ) {
		
		var re = /((\s*\S+)*)\s*/;
		return value.replace(re, "$1");
		
	}
	
	// Removes leading and ending whitespaces
	function trim( value ) {
		
		return ltrim(rtrim(value));
		
	}
	
	function checkEmail(testEmail) {
		var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
		if (!filter.test(testEmail)) {
			return false;
		} else {
			return true;
		}
	}