[newuser1001]

link=new String('<a href="/support/?setFilter=Y&amp;set_support_filter=1&amp;USER_ID=5555&amp;CLOSE=ALL" title="Обращения автора" target="_blank">(LOGIN) фио</a>')

link.id=function(){return this.match(/USER_ID=([^&]+)&/)[1]}
link.target=function(){return this.match(/target=["']([^'"]+)['"]/)[1]}
link.out=function(){return "<div id='url_login'><a href='/user/catalog_ID="+this.id()+"' target='"+this.target()+"'>LOGIN</a></div>"}

alert(link.out())