HTML word niet omgezet naar DOM element

var output = document.getElementById('output').innerHTML;
var input = document.getElementById('input').innerHTML;
input_split = input.split(/(<.*?>)/g); // Split the script in text and html tags
var text = ''; 
for (var i in input_split) {
		if(/(<.*?>)/g.test(input_split[i])){ // Check if split is tag or text
    	text += input_split[i];// if it is a htmltag do nothing
    }else{
    	//Rainbow the shit out of it
    	text += input_split[i];
    }
    
}
document.getElementById('output').innerHTML= text;