Creating placeholder for ie8 with plain javascript

common.js

var forms = document.forms;
for(var i=0; i< forms.length;i++){
  for( var t=0; t <forms[i].elements.length; t++ ){
      //console.log( forms[i].elements[t].attributes )
      var placeholder = forms[i].elements[t].attributes.placeholder.value;
    forms[i].elements[t].attributes.value.value = placeholder;
    forms[i].elements[t].addEventListener('focus',function(){
      this.value = '';  
    })
    forms[i].elements[t].addEventListener('blur',function(){
      if( this.value == "" ){ 
        this.value = placeholder;
      }
    });
    
  }
}