diff --git a/js/legacy/utils/dom.js b/js/legacy/utils/dom.js
index 34a1d4eb9b..36492ebbcd 100644
--- a/js/legacy/utils/dom.js
+++ b/js/legacy/utils/dom.js
@@ -71,11 +71,11 @@ function $ln(parent, label, onclick, style) {
 	return wn.ele.link({parent:parent, label:label, onclick:onclick, style:style})
 }
 
-function $btn(parent, label, onclick, style, class, is_ajax) {
+function $btn(parent, label, onclick, style, css_class, is_ajax) {
 	wn.require('lib/js/wn/ui/button.js');
 	if(class==='green') class='cupid-green';
 	return new wn.ui.Button(
-		{parent:parent, label:label, onclick:onclick, style:style, is_ajax: is_ajax, class: class}
+		{parent:parent, label:label, onclick:onclick, style:style, is_ajax: is_ajax, css_class: css_class}
 	).btn;
 }
 
diff --git a/js/legacy/wnf.compressed.js b/js/legacy/wnf.compressed.js
index ec67bd5bfa..dc46591165 100644
--- a/js/legacy/wnf.compressed.js
+++ b/js/legacy/wnf.compressed.js
@@ -109,7 +109,7 @@ span.set_working=function(){this.disabled=1;$di(this.loading_img);}
 span.done_working=function(){this.disabled=0;$dh(this.loading_img);}
 return span;}}
 function $ln(parent,label,onclick,style){return wn.ele.link({parent:parent,label:label,onclick:onclick,style:style})}
-function $btn(parent,label,onclick,style,class,is_ajax){wn.require('lib/js/wn/ui/button.js');if(class==='green')class='cupid-green';return new wn.ui.Button({parent:parent,label:label,onclick:onclick,style:style,is_ajax:is_ajax,class:class}).btn;}
+function $btn(parent,label,onclick,style,css_class,is_ajax){wn.require('lib/js/wn/ui/button.js');if(class==='green')class='cupid-green';return new wn.ui.Button({parent:parent,label:label,onclick:onclick,style:style,is_ajax:is_ajax,css_class:css_class}).btn;}
 function addEvent(ev,fn){if(isIE){document.attachEvent('on'+ev,function(){fn(window.event,window.event.srcElement);});}else{document.addEventListener(ev,function(e){fn(e,e.target);},true);}}
 $item_normal=function(ele){$y(ele,{padding:'6px 8px',cursor:'pointer',marginRight:'8px',whiteSpace:'nowrap',overflow:'hidden',borderBottom:'1px solid #DDD'});$bg(ele,'#FFF');$fg(ele,'#000');}
 $item_active=function(ele){$bg(ele,'#FE8');$fg(ele,'#000');}
diff --git a/js/wn/ui/button.js b/js/wn/ui/button.js
index 9fb7209415..29703ec63a 100644
--- a/js/wn/ui/button.js
+++ b/js/wn/ui/button.js
@@ -3,7 +3,7 @@ wn.ui.Button = function(args) {
 	var me = this;
 	$.extend(this, {
 		make: function() {
-			me.btn = wn.dom.add(args.parent, 'button', args.class || 'clean-gray');
+			me.btn = wn.dom.add(args.parent, 'button', args.css_class || 'clean-gray');
 
 			// ajax loading
 			me.loading_img = wn.dom.add(args.parent,'img','',{margin:'0px 4px -2px 4px', display:'none'});