

However, the window.status in real time that perfect display the loop digit, but the innerHTML property is not. 
Just display result digit: now process is "999". 
And how to using innerHTML display real time data? can but use window.setTimeout, or window.setInterval method, like this:
 var cnt=0; 
 function finnerHtml() { 
 if (cnt++>=1000) return; 
 document.getElementById("demo").innerText = "now process is \"" +cnt+ "\""; 
 window.setTimeout(finnerHtml,10) 
 } 
But, it's no convenient. the display speed is not well, and we must control something. 
e.g. 
setTimeout variables, when it completely. 
So, I propose winodw.status to replace innerHTML property when display in real time.
