//Write a JavaScript function that accepts a string as a parameter and converts the first letter of each word of the string in upper case.  
  
function uppercase(str)  
{  
  var array1 = str.split(' ');  
  var newarray1 = [];  
      
  for(var x = 0; x < array1.length; x++){  
      newarray1.push(array1[x].charAt(0).toUpperCase()+array1[x].slice(1));  
  }  
  return newarray1.join(' ');  
}  
console.log(uppercase("the quick brown fox"));