//只替换第一个“-”:2010/01-05
var dt = "2010-01-05";
var dt = dt.replace("-","/");
console.log(dt);
//替换所有“-”,g为全局标志,另外如果加i就忽略大小写:2010/01/05
var dt = "2010-01-05";
var dt = dt.replace(/-/g,"/");
console.log(dt);
替换所有‘/’为- (2010-01-05)
var dt = "2010/01/05";
var dt = dt.replace(/\//g,"-");
console.log(dt);