javascript - onSubmit validation changing label style -


i'm trying form change label color after submission if field empty , return normal when field filled in.

it's behaviour similar to: onsubmit validate change background requried fields?

except can't figure out how link inputs labels. i'm using jsfiddle link above at:

http://jsfiddle.net/interdream/cpg2r/7/

window.onload = function() { document.getelementbyid("myform").onsubmit = function() {   var fields = this.getelementsbyclassname("required"),       sendform = true;   for(var = 0; < fields.length; i++) {     if(!fields[i].value) {       fields[i].style.backgroundcolor = "#ff0000";       sendform = false;     }     else {       fields[i].style.backgroundcolor = "#fff";           }   }   if(!sendform) {     return false;   } } }

my javascript isn't good. please help!

here working sample</>


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