Javascript String Operation

// Trim() , Ltrim() , RTrim()
String.prototype.Trim = function(){ 
	return this.replace(/(^\s*)|(\s*$)/g, ""); 
} 
String.prototype.LTrim = function(){ 
	return this.replace(/(^\s*)/g, ""); 
} 
String.prototype.RTrim = function() { 
	return this.replace(/(\s*$)/g, ""); 
}

var cts = "bblText";
alert(cts.length);

if(Cts.indexOf("Text") >= 0 )  
{  
    alert('Cts中包含Text字符串');  
}