Question

I need to bind the onclick function in each link of a web page, so I use this function:

var links = document.getElementsByTagName('a');// total 5 links
for(var key in links){
   //always be true in IE, But just be true from second latest in chrome
   alert(isNaN(parseInt(key)));
   if(isNaN(parseInt(key))){
      break;
   }else{
      ...
   }
}

Please help.

Update:
It seems is the problem of for (var key in links), when is in IE, the key become the Id of the link, but it’s just number in Chrome.

Answer 1

You are enumerating other stuff beyond your anchor tags, and some of this stuff is supposed to be NaN. Use a regular for loop:

for(var i=0; i<links.length; i++) {
    // do something with links[i], 
    // which is guaranteed to be
    // an anchor tag
}