javascript - "Add to cart" button doesn't work because of ReferenceError -

i have "add cart" button in magento theme, haven't edited stopped working. defenitely worked time ago , unfortunately didn't catch moment when things went wrong. when i'm pressing button nothing happens in frontend , see error "uncaught referenceerror: productaddtocartform not defined" in console.

here button html:

<button class="button btn-cart" title="Добавить в корзину" type="button" onclick="productaddtocartform.submit(this)"><i class="icon-basket"></i>Добавить в корзину</button> 

however, when @ page source, script in page:

<script type="text/javascript"> //<![cdata[ var productaddtocartform = new varienform('product_addtocart_form'); <?php if(mage::getstoreconfig('buyshopconfig/options/ajax_add_to_cart')){?> productaddtocartform.submit = function(button, url) {      if (this.validator.validate()) {         var form = this.form;         var oldurl = form.action;          if (url) {             form.action = url;         }         var e = null;         // start of our new ajax code         if (!url) {             url = jquery('#product_addtocart_form').attr('action');         }         url = url.replace("checkout/cart","ajax/index"); // new code         var data = jquery('#product_addtocart_form').serialize();         data += '&isajax=1';         jquery('#preloader .loader').fadein(300);         try {             jquery.ajax( {                 url : url,                 datatype : 'json',                 type : 'post',                 data : data,                 success : function(data) {                     jquery('#ajax_loader').hide();                     if(data.status == 'error'){                         alert(data.message);                     }else{                         jquery('#preloader .loader').hide();                          if(jquery('.ul_wrapper.toplinks')){                             jquery('.shoppingcart').replacewith(data.sidebar);                         }                          jquery(".shoppingcart .fadelink").bind({                             mouseenter: function(e) {                                 jquery(this).find(".shopping_cart_mini").stop(true, true).fadein(300, "linear");                             },                             mouseleave: function(e) {                                 jquery(this).find(".shopping_cart_mini").stop(true, true).fadeout(300, "linear");                             }                         });                         if(jquery('#topline .links')){                             jquery('#topline .links').replacewith(data.toplink);                         }                          jquery('#preloader .inside').html('Товар "'data.name+'" был добавлен в вашу корзину');                         jquery('#preloader .message').fadein(300);                          settimeout(function(){                             jquery('#preloader .message').fadeout();                          },1500)                     }                 }             });         } catch (e) {         }         // end of our new ajax code         this.form.action = oldurl;         if (e) {             throw e;         }     } }.bind(productaddtocartform); <?php }else { ?>  productaddtocartform.submit = function(button, url) {      if (this.validator.validate()) {         var form = this.form;         var oldurl = form.action;          if (url) {             form.action = url;         }         var e = null;         try {             this.form.submit();         } catch (e) {         }         this.form.action = oldurl;         if (e) {             throw e;         }          if (button && button != 'undefined') {             button.disabled = true;         }     } }.bind(productaddtocartform);  <?php } ?>  productaddtocartform.submitlight = function(button, url){      if(this.validator) {         var nv = validation.methods;         delete validation.methods['required-entry'];         delete validation.methods['validate-one-required'];         delete validation.methods['validate-one-required-by-name'];         // remove custom datetime validators         (var methodname in validation.methods) {             if (methodname.match(/^validate-datetime-.*/i)) {                 delete validation.methods[methodname];             }         }          if (this.validator.validate()) {             if (url) {                 this.form.action = url;             }             this.form.submit();         }         object.extend(validation.methods, nv);     } }.bind(productaddtocartform);  <?php if(!mage::helper('lightboxes')->isactive()):?> jquery("a.video").click(function() {     jquery.fancybox({         'padding'       : 0,         'autoscale'     : false,         'transitionin'  : 'none',         'transitionout' : 'none',         'title'         : this.title,         'width'     : 680,         'height'        : 495,         'href'          : this.href.replace(new regexp("watch\\?v=", "i"), 'v/'),         'type'          : 'swf',         'swf'           : {             'wmode'     : 'transparent',             'allowfullscreen'   : 'true'         }     });      return false; }); <?php endif;?> //]]> 

could give answer problem function?

on line (688)

jquery('#preloader .inside').html('Товар "'data.name+'" был добавлен в вашу корзину'); 

you're missing +

jquery('#preloader .inside').html('Товар "' + data.name + '" был добавлен в вашу корзину');