(function(){function maybePrefixUrlField(){const value=this.value.trim()
if(value!==''&&value.indexOf('http')!==0){this.value='http://'+value}}
const urlFields=document.querySelectorAll('.mc4wp-form input[type="url"]')
for(let j=0;j<urlFields.length;j++){urlFields[j].addEventListener('blur',maybePrefixUrlField)}})();