2017-03-06 48 views

回答

0

这看起来不是JS工作也:

var sel = document.getElementById("colorSelect"); 

sel.onfocus = function() { 
    var nodes = this.options; 
    for (i = 0; i < nodes.length; i++) { 
     nodes[i].style.color = nodes[i].style.color; 
    } 
}; 

http://output.jsbin.com/felisubare/1