Modernizr.interactivevalidation=(function(){if(!Modernizr.input.required){return false;}
var form=document.createElement('form');form.onsubmit=function(e){e.preventDefault();}
form.innerHTML='<input required><button></button>';form.style.position='absolute';form.style.top='-99999em'
document.body.appendChild(form);var input=form.getElementsByTagName('input')[0];var invaildFired=false;input.oninvalid=function(){invaildFired=true;};var button=form.getElementsByTagName('button')[0];button.click();document.body.removeChild(form);return invaildFired;})();