Display Date from datetime in MS CRM

Write the below script in onchange of date field

var m_names = new Array("January", "February", "March", 
"April", "May", "June", "July", "August", "September", 
"October", "November", "December"); 
var d = new Date(); 
var curr_date = d.getDate(); 
var curr_month = d.getMonth(); 
var curr_year = d.getFullYear(); 
alert(curr_date+"-"+m_names[curr_month] +"-"+ "-" + curr_year);