Скрипт JS для работы placeholder lte IE9

<input type="text" value="" placeholder="E-mail-1">
<input type="text" value="" placeholder="E-mail-2">
<input type="text" value="Value указан" placeholder="E-mail-3">

<style type="text/css">
      .placeholdr { color: gray }
</style>

<!--[if lt IE 10 ]>
<script type="text/javascript">
var input = document.getElementsByTagName('input'); // get all text fields
var cls = "placeholdr"; // set name of the class

if (input) { // if fields found
 for (var i=0; i < input.length; i++) {  
     var t = input[i];
     var txt = t.getAttribute("placeholder");
     if (txt.length > 0) { // if placeholder found
        t.className = t.value.length == 0 ? t.className+" "+cls : t.className; // add class
        t.value = t.value.length > 0 ? t.value : txt; // if no value found
     
     t.onfocus = function() { // on focus
       this.className = this.className.replace(cls);
       this.value = this.value == this.getAttribute("placeholder") ? "" : this.value;
     }
   
     t.onblur = function() { // on focus out
       if (this.value.length == 0) {
         this.value = this.getAttribute("placeholder");
         this.className = this.className+" "+cls; // add class
       }
     }
   }
 }
}
})();
</script>
<![endif]-->