This function takes milliseconds as input and converts it into human readable form. Useful in showing time elapsed or ETA.

Human readable time format in Javascript.

/**
 * This function takes milliseconds as input and converts it into "D H M S ms" format.
 *
 * @author Shubham Jain <shubham.jain.1@gmail.com> 
 * @license MIT License
 */
function timeFormat( miliseconds )
{
	formatArr = {
		"d": 24 * 60 * 60 * 1000,
		"h": 60 * 60 * 1000,
		"m": 60 * 1000,
		"s": 1000,
		"ms": 1
	}
	
	var timeStr = "";
	
	for ( index in formatArr )
	{
		if( Math.floor(timeUnit = miliseconds / formatArr[ index ]) )
		{
			timeStr += Math.floor(timeUnit) + index + " "; 
			miliseconds = miliseconds % formatArr[ index ];
		}
	};
	return timeStr.trim();
}