if(0 >= this.tabPosition.indexOf('-h')){ return; } if(!this.pane2button){ return; } var maxLen = 0; for(var pane in this.pane2button){ maxLen = Math.max(maxLen, dojo.marginBox(this.pane2button[pane].innerDiv).w); } //unify the length of all the tabs for(pane in this.pane2button){ this.pane2button[pane].innerDiv.style.width = maxLen + 'px'; }