Copy the entire line below (it's a long one!) and follow instructions in the How-to.

javascript:(function(){var ca,cea,cs,df,dfe,i,j,x,y;function n(i,what){return i+%22 %22+what+((i==1)?%22%22:%22s%22)}ca=cea=cs=0;df=document.forms;for(i=0;i<df.length;++i){x=df[i];dfe=x.elements;if(x.onsubmit){x.onsubmit=%22%22;++cs;}if(x.attributes[%22autocomplete%22]){x.attributes[%22autocomplete%22].value=%22on%22;++ca;}for(j=0;j<dfe.length;++j){y=dfe[j];if(y.attributes[%22autocomplete%22]){y.attributes[%22autocomplete%22].value=%22on%22;++cea;}}}alert(%22Removed autocomplete=off from %22+n(ca,%22form%22)+%22 and from %22+n(cea,%22form element%22)+%22, and removed onsubmit from %22+n(cs,%22form%22)+%22. After you type your password and submit the form, the browser will offer to remember your password.%22)})();