code: public String getResizeEndDefinition() {
  		StringBuilder sb = new StringBuilder();
  		sb.append("$(window).resize(function() {").
  		   append("if(this.resizeTO) clearTimeout(this.resizeTO);").
  		   append("this.resizeTO = setTimeout(function() {").
  		   append("$(this).trigger('resizeEnd');").
  		   append("}, 500);").
  		   append("});");
  		return sb.toString();
  	}
docs: http://stackoverflow.com/questions/2996431/detect-when-a-window-is-resized-using-javascript