function validateCreditCard(e){var d="0123456789";var b="";for(i=0;i<e.length;i++){x=e.charAt(i);if(d.indexOf(x,0)!=-1){b+=x}}j=b.length/2;k=Math.floor(j);m=Math.ceil(j)-k;c=0;for(i=0;i<k;i++){a=b.charAt(i*2+m)*2;c+=a>9?Math.floor(a/10+a%10):a}for(i=0;i<k+m;i++){c+=b.charAt(i*2+1-m)*1}return(c%10==0)};