string.js

Java开发的权限管理的例子

function String_trim()
{
	var str = this;
	var l1=str.length;
//	alert("len="+l1);
	if (l1>0) {
  str1=str.substring(0,1);
  str2=str.substring(l1-1);
  if ((str1!=" ") && (str2!=" ")) return str;
  if (str1==" ") str = str.replace(/ +/,"");
	if (str2==" ") str = str.replace(/ +$/,""); //&&(l1>1)
	}
	return str;
}
String.prototype.trim = String_trim;