Make every word in a sentence capitalized

formatStringArray.js

function formatReportTitle(objectKeys){
		var formattedReportArray = []; 
		for (a = 0; a <= objectKeys.length -1; a++){ //loop through array of report types/object keys
			var splitString = objectKeys[a].split("_"); //slpit the array by "_"
			//loop through each string item
			for (var b = 0; b <= splitString.length -1; b++ ){
				splitString[b] = splitString[b].split(''); //splits string into array of letters
				splitString[b][0] = splitString[b][0].toUpperCase(); //makes first letter capitalizes
				splitString[b]= splitString[b].join(''); //converts array of letter back to word
			}
			formattedReportArray.push(splitString.join(" ")); //converts words into a sentance
		}
		return formattedReportArray; 		
	}