function Char_Counts(str1) {  
var uchars = {};  
str1.replace(/\S/g, function(l){uchars[l] = (isNaN(uchars[l]) ? 1 : uchars[l] + 1);});  
return uchars;  
}  
console.log(Char_Counts("The quick brown fox jumps over the lazy dog"));