print_r.js

function print_r(arr) {
			
	if( arr.constructor == Array || arr.constructor == Object ) {				
		document.write('<ul>');
				
		for( var p in arr ) {
			if( arr[p].constructor == Array || arr[p].constructor == Object ) {
				document.write('<li>['+p+'] => '+typeof(arr)+'</li>');
				document.write('<ul>');
				print_r(arr[p]);
				document.write('</ul>');
			} else {
				document.write('<li>['+p+'] => '+String(arr[p]).replace(/<\/?[^>]+>/gi, '')+'</li>');
			}
		}
			
		document.write('</ul>');
	}
			
}