I have an input box...

<input type="text" id="search_member" onkeyup="lookup(this.value);">

When I type in the field, it will go to function lookup(). From there I want to get the id of this input. I tried...

var This_id = $(this).attr("id");

but this won't work. Any suggestions on how I can get the id?

I have an input box...

<input type="text" id="search_member" onkeyup="lookup(this.value);">

When I type in the field, it will go to function lookup(). From there I want to get the id of this input. I tried...

var This_id = $(this).attr("id");

but this won't work. Any suggestions on how I can get the id?

• javascript
• jquery

6 Answers 6

Because you are passing this.value to your lookup() function. It's better to pass this to your function and then use arg.value to get the value and arg.getAttribute('id') for the id

<input type="text" id="search_member" onkeyup="lookup(this);">

function lookup(arg){
 var id = arg.getAttribute('id');
 var value = arg.value;
 // do your stuff
}

Get rid of onkeyup="lookup(this.value);

<input type="text" id="search_member">

and then use

$(function(){
    $("#search_member").keyup(function(e){
        var This_id = $(this).attr("id");
    });
};

$(document).keyup(function(e) {
    if (e.currentTarget.activeElement != undefined) {
     var id = $(e.currentTarget.activeElement).attr('id');
  }
});

The problem there is you're not passing the element in, you're passing the value. You need to change it to this:

<input type="text" id="search_member" onkeyup="lookup(this);">

Then the rest of your code should work fine.

why dont you give the function lookup the THIS?

 lookup(this);

then u can also use the code you suggested

To get the id you should use this.id not this.value. I hope it work with you