ROBOT.LK

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<script type="text/javascript">

var changeWatcher = {
    timeout: null,
    currentValue: '',
    watchForChange: function( el ) {
        if( el.value != this.currentValue ) {
            this.changed( el );
        }
        this.timeout = setTimeout( function() {
             changeWatcher.watchForChange(el)
        }, 200 );
    },
    cancelWatchForChange: function() {
        clearTimeout( this.timeout );
        this.timeout = null;
    },
    changed: function( el ) {
        this.currentValue = el.value;
        // do something with the element and/or it's value
        //console.log( el.value );
    }
}

</script>
<input type='text' value='abc' onfocus='changeWatcher.watchForChange(this)' onblur='changeWatcher.cancelWatchForChange()' onchange='changeWatcher.changed(this)' />