js replace text link with anchor tags
var exp_match = /(\b(https?|):\/\/[-A-Z0-9+&@#\/%?=~_|!:,.;]*[-A-Z0-9+&@#\/%=~_|])/ig;
var element_content=content.replace(exp_match, "<a href='$1'>$1</a>");
var new_exp_match =/(^|[^\/])(www\.[\S]+(\b|$))/gim;
var new_content=element_content.replace(new_exp_match, '$1<a target="_blank" href="http://$2">$2</a>');